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Diversified Electronics Phase Voltage Monitors

AC-2020 Three Phase Compressor Protector
MPA Overload Relay
PRA Series Phase Sequence Monitors
SLA Series General SLA Series Information
    (Plug-In Style Enclosure)
    (Surface Mounted Enclosure)
    (Epoxy Encapsulated)
PBC Series Three Phase Voltage Band Monitor/Relays
PBD Series Three Phase Sequence Voltage Band Monitor/Relays
PBE Series True RMS Three Phase Sequence and Voltage Band Monitor/Relay
SLB Series Phase Unbalance, Phase Loss and Phase Sequence Monitor/Relays
SLC Series Phase Unbalance and Phase Loss Monitor/Relays
SLD Series Phase Unbalance, Phase Loss, Under Voltage and Phase Sequence Monitor/Relays
    (Plug-In)
    (Surface Mount)
SLE Series Phase Unbalance, Phase Loss and Under Voltage Monitor/Relays
SLH Series Phase Loss, Under Voltage and Phase Sequence Monitor/Relay with Adjustable Hysteresis
SLJ Series Phase Loss, Under Voltage and Phase Sequence Monitor/Relay with Adjustable Delay-on-Make Timer
SLM Series Microprocessor Controlled Three Phase Monitor/Relays
SLU Series Universal Phase Monitor/Relay
SLU-600-ASTDS
SLU-OEM1
UOA Series Single Phase Under Voltage Monitor/Relays
VBA Series Single Phase Voltage Band Monitor/Relays

AC-2020
 

AUTO MODE Upon application of normal line voltages, the Delay-On-Make time delay will begin and the green LED indicator will flash. On completion of the delay, the output relay will energize and the green LED indicator will glow. When a fault condition occurs, the green LED indicator and output relay will de-energize and the appropriate fault indicator(s) will glow. When conditions return to normal, the applicable fault indicator(s) will extinguish and the output relay will automatically reset (energize) on completion of the Delay-On-Make time delay. A manual test may be accomplished during normal operation by moving the memory reset switch to the RESET position and releasing. Reset will cause output relay to de-energize and green LED indicator to flash. After completion of the preset Delay-On-Make time delay, the output relay will re-energize and the green LED indicator will glow.

MANUAL MODE Upon application of three phase line voltages, the output relay will remain de-energized. If line voltages are within preset limits, the output relay will be energized and the green LED indicator will glow by momentarily placing the reset switch in the RESET position. The memory function is active with the reset switch in the W/MEMORY position. Upon fault conditions and subsequent restoration of normal conditions, the appropriate fault indicator(s) glow continuously. To clear fault indicators and re-energize relay, move the reset switch momentarily to the RESET position and release. If the memory function is not desired, place reset switch in the W/O MEMORY position.

DELAY MODE Upon application of normal line and control voltages, the green LED indicator will glow and the control output will energize. Line faults and/or control voltage (19-288 VAC) interruptions will cause the control output to de- energize. During abnormal conditions the green LED indicator flashes for the 3 minute Delay-On-Break time delay. Subsequent interruptions will not lengthen the delay. After the delay expires and conditions have returned to normal, the green LED indicator will glow and the control output will re-energize. If the control volt- age is not restored to normal within the delay, the green LED indicator will continue to flash and the control output will remain de-energized. Subsequent restoration will result in immediate control output.
 

Operating Voltage:
Auto Ranges
240 VAC: 190-270 VAC, Adj. 50/60 Hz
480 VAC: 380-540 VAC, Adj. 50/60 Hz
Maximum Voltage: 550 VAC
Trip Points
 
Under Voltage: -10% of setting
Over Voltage: +10% of setting
Hysteresis: Differential between pick up and drop out, 5% of nominal setting.
 
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MPA-1000
 

The MotorGuardian (TM) is a microprocessor based overload relay, designed to provide protection for 3-phase AC motors. It offers a broad range of features in one compact package providing a cost effective solution for monitoring and managing motor performance. A unique feature of the MotorGuardian is its ease of installation. It is provided with Clamp-On C.T.'s that can accommodate up to 1500 ampere loads. Actual motor operating conditions are accessed by the scrolling menu and viewed by a two line highly visible vacuum fluorescent display. Fault conditions are also displayed indicating the specific cause of the occurring fault.
 

Approval: UL Listed
Input Voltage: 200-500 VAC 3-Phase (Nominal)
Frequency: 50/60 Hz
Phase Sequence: ABC (will not operate CBA)
Output Contact: DPDT; Form "C" 10 A @ 240 VAC
Alarm Output: SPDT; Form "C" 10 A @ 240 VAC
Control Voltage: None Required
 

RELAY ACCURACY

 
Voltage: ±1%
Current: ±1%
G. F. Timing: ±10%
Timing: 5% ±1 Second
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PRA Series


 

The PRA-100 Series are designed to allow the output to energize only when the phase connections are in the proper sequence. For use in applications where motor direction is critical or the installation is required by code to have sequence detection.
 

Operating Voltage: 208-480 VAC ±15%, phase-to-phase, 50/60 Hz
Phase Sequence: ABC (Will Not Operate CBA)
Response Time: 200 mSec. (approximately)
Reset: Automatic
Output Rating Style A & N: SPDT, 10 Amps @ 240 VAC Resistive, 1/2 hp @ 240 VAC
Style E: DPDT, 10 Amps @ 240 VAC Resistive, 1/2 hp @ 240 VAC
Temperatures Operate: 0°C to +55°C
Storage: -45°C to +85°C
Total Apparent Power: 11 VA @ 480 VAC
Indicators Green LED: Glows on correct sequence
Red LED: Glows on incorrect sequence
Enclosures Style “A”: Model No. PRA-100-AFA, LEXAN® dust cover 8 pin plug-in
Style “N”: Model No. PRA-100-AFN, Glass filled VALOX® surface mounted 6-1/4" male quick connect
Style “E”: LEXAN® Surface Mount Model No. PRA-100-AFE, #8-32 screws
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SLA Series

SUA Series
 


 

The SLA Series is designed to protect three-phase equipment against Phase Loss, Under Voltage, and Phase Reversal conditions.

With normal operating voltages applied in the proper ABC sequence, the internal relay will energize (PICKUP). When incorrect phase sequence or phase loss occurs or the three-phase voltages fall below the drop out voltages, the relay will de-energize (DROPOUT).

Both Delta and Wye systems may be monitored. In Wye systems, connections to neutral are not required.
 

Dropout Voltage 1 Ø Low: 83% of Nominal
3 Ø Low: 90% of Nominal
Response Times Models Up to 300 VAC
Operate: 250 Milliseconds
Release: 0.5 Seconds
  Models Over 300 VAC
Operate: 1.0 Seconds
Release: 2.0 Seconds
Temperatures Operate: 0°C to +55°C
Storage: -45°C to +85°C
Phase Sequence: ABC (Will Not Operate CBA)
U.S. Patent Number: 3,611,050
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SLA Series (Plug-In Style Enclosure)

 

Operating Voltage: See table on data sheet
Phase Sequence: ABC (Will Not Operate CBA)
Power Required: 3 VA (Approximately)
Indicator LED: Glows When All Conditions Are Normal (On Applicable Models)
Response Times: Models Up to 300 VAC
Operate: 250 Milliseconds
Release: 0.5 Seconds
  Models Over 300 VAC
Operate: 1 Second
Release: 2.0 Seconds
Reset: Automatic
Agency Approval: UL Approved: File #E55826;
Reference Classification UL-508
  CSA Certified: File #LR40123;
Reference Specification C22.2 No. 0 and C22.2 No. 14
U.S. Patent Number: 3,611,050
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SLA Series (Surface Mounted Enclosure)
 


 

Operating Voltage: See table on data sheet
Phase Sequence: ABC (Will Not Operate CBA)
Power Required: 3 VA (Approximately)
Indicator LED: Glows When All Conditions Are Normal (On Applicable Models)
Response Times: Models Up to 300 VAC
Operate: 250 Milliseconds
Release: 0.5 Seconds
  Models Over 300 VAC
Operate: 1 Second
Release: 2.0 Seconds
Reset: Automatic
Agency Approval: UL Approved: File #E55826; Reference Classification UL-508
  CSA Certified: File #LR40123; Reference Specification C22.2 No. 0 and C22.2 No. 14
U.S. Patent Number: 3,611,050
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SLA Series (Epoxy Encapsulated)

 

Operating Voltage: See table on data sheet
Phase Sequence: ABC (Will Not Operate CBA)
Power Required: Models Up to 300 VAC: 3 VA, Maximum
Models Over 300 VAC: 7 VA, Maximum
Models Over 500 VAC: 3 VA, Maximum
Indicator LED: Glows When All Conditions Are Normal
Response Times
 
Models Up to 300 VAC
Operate: 250 Milliseconds
Release: 0.5 Seconds
  Models Over 300 VAC
Operate: 1.0 Second
Release: 2.0 Seconds
Agency Approval: UL Approved: File #E55826; Reference Classification UL-508

CSA Certified: File #LR40123; Reference Specification C22.2 No. 0 and C22.2 No. 14

U.S. Patent Number: 3,611,050
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PBC Series
 


 

The PBC Series offers protection to three-phase equipment that is required to operate between two voltage limits. All three phases are monitored individually for a preselected under and over voltage limit.

With normal operating voltages applied, the internal relay will energize (PICKUP). When the voltages on any or all phases fall outside the preset Over/Under trip points for loner than the Release delay, the relay will de-energize (DROPOUT). When line conditions return to normal, the PBC Series Monitor automatically resets and the internal relay energizes.

Hysteresis: 4%
Response Times Operate: 100 Milliseconds
Release: 0.5 Seconds
Output Rating: DPDT, 3 Amps @ 600 VAC,
Resistive; 360 VA @ 600 VAC,
Inductive; 1/2 hp
Indicators LED: Glows On Fault; (1) For Over,
(1) For Under
Temperatures Operate: 0° to +40°C
Release: -45° to +85°C
Power Required Models Up to 300 VAC:
7 VA, Maximum
Models Over 300 VAC:
6 VA, Maximum
Repeat Accuracy: 0.1% @ Fixed Condition
Reset: Automatic
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PBD Series
 


 

The PBD Series offers protection to three-phase sequence sensitive equipment that is required to operate between two voltage limits. All three phases are monitored individually for a preselected Under and Over voltage limit.

With normal operating voltages applied in the proper ABC sequence, the internal relay will energize (PICKUP). When the voltages on any or all phases fall outside the preset Over/Under trip points for longer than the Adjustable Release delay, the relay will de-energize (DROPOUT). When line conditions return to normal, the PBD Series Monitor automatically resets and the internal relay energizes.

Both Delta and Wye systems may be monitored. In Wye systems, connections to neutral are not required.

Phase Sequence: ABC (Will Not Operate CBA)
Hysteresis: 4%
Response Times Operate: 100 Milliseconds
Release: 0.1 to 30 Seconds, Adjustable
Output Rating: DPDT, 3 Amps @ 600 VAC,
Resistive; 360 VAC @ 600 VAC,
Inductive; 1/2 hp
Indicators LED: Glows On Fault; (1) For Over, (1) For Under
Temperatures Operate: 0° to +40°C
Release: -45° to +85°C
Power Required Models Up to 300 VAC: 7 VA, Maximum
Models Over 300 VAC: 6 VA, Maximum
Repeat Accuracy: 0.1% @ Fixed Condition
Reset: Automatic
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PBE Series

 

In today’s industrial environment, Line Noise and Power Line Harmonics are becoming an increasing problem. True-RMS detection may be necessary for achieving accurate Line Voltage measurement.

With normal operating voltages applied in the proper ABC sequence, the internal relay will energize (PICKUP). When the voltages on any or all phases fall outside the preset Over/Under trip points for longer than the Dropout Time delay, the relay will de-energize (DROPOUT). When line conditions return to normal, the PBE Series Monitor automatically resets and the internal relay energizes.

 

Phase Sequence: ABC (Will Not Operate CBA)
Hysteresis: 2%
Response Times Operate: 200 Milliseconds (approximately)
Release: 0.2 to 30 Seconds, Adjustable
Output Rating: DPDT, 10 Amps Resistive, 1/4 HP @ 240 VAC
Indicators LED: Glows On Fault; (1) For Over, (1) For Under, (1) For Sequence
Temperatures Operate: 0°C to +40°C
Storage: –45°C to +85°C
Repeat Accuracy: 0.1% @ Fixed Condition
Reset: Automatic
Enclosure: Style “E” LEXAN® Surface Mount
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SLB Series


 

The SLB Series is designed to protect three-phase equipment against Phase Unbalance, Phase Loss, and Phase Reversal conditions.

With normal operating voltages in the proper ABC sequence and the 120 VAC control voltage applied, the internal relay will energize (PICKUP). When any combination of Phase Unbalance exceeding the preset value or Phase Loss or Phase Reversal occurs for longer than the preset drop out time, the output relay will de-energize (DROPOUT). If the control voltage is removed, the relay will de-energize.

The wide input voltage range permits use on any one of several standard line voltages without recalibrating. The unbalance detection level is adjustable from 2% to 15%.

Both Delta and Wye systems may be monitored. In Wye systems, connections to neutral are not required.

The LED indicator glows when conditions are normal.

 

Operating Voltage: See Table on Data Sheet
Phase Sequence: ABC (Will Not Operate CBA)
Control Voltage: 120 VAC, 1 Phase, 60 Hz
Response Times Operate: 60 Milliseconds, Fixed
Release: 0.1 to 5 Seconds, Adjustable
Output Rating: SPDT, 10 Amps @ 120 VAC, 5 Amps @ 240 VAC, Resistive
Indicators LED: Glows When All Conditions Are Normal
Temperatures Operate: 0°C to +55°C
Storage: -45°C to +85°C
Repeat Accuracy: 0.1% @ Fixed Condition
  The SLB Series will not detect an equal and simultaneous reduction in voltage on all three lines (Brown Out).
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SLC Series

 

The SLC Series is designed to protect three-phase equipment against Phase Unbalance and Phase Loss conditions.

With normal operating voltages applied to all three phases, the internal relay will remain de-energized (DROPPED-OUT).

When a Phase Loss or Phase Unbalance exceeding the preselected trip point occurs, the relay will energize (PICKUP). The SLC series is typically used in conjunction with a shunt trip breaker.

Both Delta and Wye systems may be monitored. In Wye systems, connections to neutral are not required.

 

Operating Voltage: See Table on Data Sheet (click on Data Sheet button to the left)
Phase Unbalance Range: 2% to 10%, Adjustable
Response Times Operate: .08 Seconds
Release: .7 Seconds
Temperatures Operate: 0ºC to +55ºC
Storage: -45ºC to +85ºC
Indicator LED: Glows On Fault Condition
Transient Protection: 1000 Volts For 8 Milliseconds
Reset: Automatic
U.S. Patent Number: 4,331,995
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SLD Series (Plug in)

 


 

The SLD Series is designed to protect three-phase equipment against Phase Unbalance, Phase Loss, Under Voltage, and Phase Reversal conditions.

With normal operating voltage present on all three phases in the proper phase sequence, the internal relay will operate (PICKUP). When an incorrect phase sequence or phase loss occurs or the three phase line voltages fall outside the preset unbalance or under voltage settings, the internal relay will release (DROPOUT). When all conditions return to normal, the relay will reset.

The Adjustable Release delay is provided to ignore momentary voltage fluctuations that cause nuisance tripping.

Both Delta and Wye systems may be monitored. In Wye Systems, connections to neutral are not required.

Operating Voltage: See Table on Data Sheet (click on Data Sheet button to the left)
Phase Sequence: ABC (Will Not Operate CBA)
Phase Unbalance Range: 2% to 10%, Adjustable
Response Times  Operate: 120 milliseconds
 Release: 0.1 to 20 seconds, Adjustable (on Under Voltage only); 100 milliseconds on Phase Reversal and Unbalance
Output Rating: SPDT, 10A @ 240 VAC, Resistive; 1/2 hp @ 240 VAC
Power Required: 3VA Typical
Isolation Input/Output: 2500 Volts
Temperatures Operate: 0°C to +55°C
Storage: -45°C to +85°C
Indicator LED: Glows When All Conditions Are Normal
Transient Protection: 1000 Volts for 8 Milliseconds
Reset: Automatic
U.S. Patent Number: 4,331,995
Agency Approval: UL Recognized File #E55826
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SLD Series
(Surface Mount)
 


 

The SLD Series is designed to protect three-phase equipment against Phase Unbalance, Phase Loss, Under Voltage, and Phase Reversal conditions.

With normal operating voltage present on all three phases in the proper phase sequence, the internal relay will operate (PICKUP). When an incorrect phase sequence or phase loss occurs or the three phase line voltages fall outside the preset unbalance or under voltage settings, the internal relay will release (DROPOUT). When all conditions return to normal, the relay will reset.

The Adjustable Release delay is provided to ignore momentary voltage fluctuations that cause nuisance tripping.

Both Delta and Wye systems may be monitored. In Wye Systems, connections to neutral are not required.

Operating Voltage: See Table on Data Sheet (click on Data Sheet button to the left)
Phase Sequence: ABC (Will Not Operate CBA)
Phase Unbalance Range: 2% to 10%, Adjustable
Response Times  Operate: 120 milliseconds
 Release: 0.1 to 20 seconds, Adjustable (on Under Voltage only); 100 milliseconds on Phase Reversal and Unbalance
Output Rating: SPDT, 10A @ 240 VAC, Resistive; 1/2 hp @ 240 VAC
Power Required: 3VA Typical
Isolation Input/Output: 2500 Volts
Temperatures Operate: 0°C to +55°C
Storage: -45°C to +85°C
Indicator LED: Glows When All Conditions Are Normal
Transient Protection: 1000 Volts for 8 Milliseconds
Reset: Automatic
U.S. Patent Number: 4,331,995
Agency Approval: UL Recognized File #E55826
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SLE Series
 


 

The SLE Series is designed to protect three-phase equipment against Phase Unbalance, Phase Loss, and Under Voltage.

With normal operating voltage present on all three phases, the internal relay will energize (PICKUP). When a phase loss occurs or the voltages fall outside the preset unbalance or under voltage settings, the internal relay will de-energize (DROPOUT). The relay automatically resets when the line conditions return to normal.

Both Delta and Wye systems may be monitored. In Wye Systems, connections to neutral are not required.

Operating Voltage: See Table on Data Sheet (click on Data Sheet button to the left)
Phase Unbalance Range: 2% to 10% Adjustable
Response Times  Models Up to 300 VAC:
  Operate: 60 Milliseconds
  Release: 0.5 Seconds
 Models Over 300 VAC:
  Operate: 1.0 Seconds
  Release: 2.0 Seconds
Temperatures Operate: 0°C to +55°C
Storage: -45°C to +85°C
Indicator LED: Glows When All Conditions Are Normal
Transient Protection: 1000 Volts for 8 Milliseconds
Reset: Automatic
U.S. Patent Number: 4,331,995
Agency Approval: UL Listed File #E55826
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SLH Series
 


 

The SLH Series is designed to protect equipment against PHASE LOSS (single phasing), UNDER VOLTAGE (brown outs), and PHASE REVERSAL (improper sequence).

When correct phase sequence and line voltage are present, the internal relay of the SLH will energize (PICK UP). When there is a phase loss, under voltage or phase reversal condition, the internal relay will de-energize (DROPOUT). When conditions return to normal, the SLH will automatically reset.

The SLH is unique in that it has a field adjustable hysteresis. The voltage setting is adjusted to the desired pickup point indicated by the dial setting. Then, the hysteresis adjustment is set to the desired percentage to achieve the preferred dropout point. When models up to 300 VAC are set at 0%, they will PICKUP and dropout at the same point, when set at 10%, the dropout will be an average of the phase-to-phase voltages 10% below the dial setting pickup point. Models over 300 VAC are adjustable from 0% to 15%.

The SLH is available in the standard voltage ranges (see table below). It has an LED indicator that glows when all conditions are normal. The SLH Series is UL Listed under

UL File Number E55826.

Operating Voltage: See Table on Data Sheet (click on Data Sheet button to the left)
Phase Sequence: ABC (Will Not Operate CBA)
Power Required: See Table on Data Sheet (click on Data Sheet button to the left)
Indicator LED: Glows When All Conditions Are Normal
Response Times: See Table on Data Sheet (click on Data Sheet button to the left)
Reset: Automatic
Hysteresis Models Up to 300 VAC: Adjustable, 0% to 10% Below Pickup
Models Over 300 VAC: Adjustable, 0% to 15% Below Pickup
Output Rating Models up to 300 VAC: DPDT, 10 Amps @ 120 VAC, Resistive; 211 VA @ 120 VAC, Inductive
Models Over 300 VAC: DPDT, 5 Amps @ 240 VAC, Resistive; 345 VA @ 240 VAC, Inductive
Temperatures Operate: 0°C to +55°C
Storage: -45°C to +85°C
Terminations: (12) #8-32 Screw Terminals
Agency Approval: UL Listed; file #E55826
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SLJ Series
 


 

The SLJ Series has a built-in Delay-on-Make Time Delay. The SLJ continuously monitors the three phase lines for adverse conditions such as PHASE LOSS (single phasing), UNDER VOLTAGE (brown outs), and PHASE REVERSAL (improper sequence). When any of these conditions occur, the internal relay will de-energize (DROPOUT). When the fault is corrected, the field adjustable delay-on-make delay begins. Upon completion of the time delay, the internal relay will energize (PICKUP). Any subsequent interruptions will reset the delay period.

The SLJ’s phase monitor operates the same as the SLA Series. It will dropout for a phase loss if any phase drops below 83% of its nominal setting and it will also dropout for under voltage if all three phases drop below 90% of its nominal setting. It is phase sequence sensitive and will not allow startup if the three phases are reversed.

The SLJ is available in the same standard operating voltage ranges as our other Phase Monitors (see table below). The delay-on-Make Timer is field adjustable from 0.2 to 8.0 minutes.

There are two LED indicators. The green indicator glows when all conditions are normal, and the red indicator glows when the internal relay is energized.

The SLJ is ideally suited for multiple equipment installations to stagger start equipment after a fault condition.

Operating Voltage: See Table on Data Sheet (click on Data Sheet button to the left)
Power Dissipation: See Table on Data Sheet (click on Data Sheet button to the left)
Indicators Green LED: Glows When All Conditions Are Normal
Red LED: Glows When Relay is Energized
Response Times Operate: 0.2 to 8.0 Minutes, Adjustable
Release: See Table on Data Sheet
Output Rating: See Table on Data Sheet
Temperatures Operate: 0°C to +55°C
Storage: -45°C to +85°C
Enclosure: Style “E” LEXAN, Surface Mounted
Terminations: (12) #8-32 Screw Terminals
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SLM Series
 


 

Phase Sequence: ABC (Will Not Operated CBA)
Voltage Trip Points Drop -Out: ±10% of Setting
Pickup: ±7% of Setting
Frequency Trip Points Dropout: ±4% of 60 Hz (380 V, 50 Hz)
Pickup ±3% of 60 Hz (380 V, 50 Hz)
Unbalance Trip Points Dropout: 7%
Pickup: 5%
Output Rating: DPDT, 360 VA Inductive; 1/2 hp 3 A Resistive @ 600 VAC
Response Times Operate Sampling: 2 Seconds
Delay-on-make: (Sampling Delay) + (1.5 seconds to 5 minutes Delay)
Adjustable in one (1) minute increments
Release Under Voltage 1.5 Seconds, (Approximately)
Over Voltage: 1.5 Seconds, (Approximately)
Frequency Shift: 1.5 Seconds, (Approximately)
Unbalance: 2.0 Seconds, (Approximately)
*Phase Loss/Shift: 1.0 Seconds, (Approximately)
Reset Modes: Automatic; Manual: Automatic w/Memory
† LED Indicators:      
Designation Color State Condition
Time Delay/Normal Green

 
Flashing
ON
Timing
Output Energized
Under Voltage Red ON Fault
Over Voltage Red ON Fault
Phase Sequence, Shift Red ON Fault
Frequency Shift Red ON Fault
Unbalance Red ON Fault
Power Required: 7 VA Typical
Transient Withstand: 2500 Volts for 10 ms
Temperatures Operate: 0°C to + 55°C
Storage: -45°C to +85°C
Enclosure: LEXAN Surface Mounted
Terminations: #8-32 Screw Terminals
Agency Approvals: UL Listed: File #E55826
CSA Certified
File #LR40123
 

SLU Series
 


 

The Line-Line voltage adjustment is set to the appropriate nominal voltage and frequency scale (there is infinite set point resolution between minimum and maximum on each scale). With normal operating voltage present on all three phases in the proper sequence, the internal relay will energize (Pickup). When an incorrect phase sequence, phase loss, under voltage, over voltage, frequency shift or unbalance condition occurs greater than the settings, the internal relay will de-energize when the adjustable Restart Delay has expired.

Both Delta and Wye systems may be monitored. In Wye systems, connections to neutral are not required.

Over/Under Voltage
Phase Unbalance Phase Loss
Phase Reversal
Adjustable Restart Delay
Adjustable Fault Delay
Operating Ranges: 200-500VAC 3Ø
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SLU-600-ASTDS Series
 


The Line-to-Line voltage adjustment is set to the appropriate nominal voltage and frequency scale. When 120VAC control voltage is applied and normal operating voltage is present on all three phases in the proper sequence, the internal relay energizes and the Auto-Scale locks-in. Auto-scale will only reactivated by removal and re-application of control voltage. When an incorrect phase sequence phase loss, under voltage, over voltage, frequency shift, or unbalance condition occurs greater than the settings, the internal relay will de-energize (dropout) after the fault Response Time has expired. When all conditions return to normal, the relay will energize when the adjustable Restart Delay has expired.

Both Delta and Wye systems may be monitored. In Wye systems, connections to neutral are not required.

Over/Under Voltage
Phase Unbalance Phase Loss
Phase Reversal
Adjustable Restart Delay
Adjustable Fault Delay
Adjustable Operating Ranges: 200-630VAC 3Ø
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SLU-OEM1 Series
 


 

The Line-Line voltage adjustment is set to the appropriate nominal voltage and frequency scale (there is infinite set point resolution between minimum and maximum on each scale). With normal operating voltage present on all three phases in the proper sequence, the internal relay will energize (Pickup). When an incorrect phase sequence, phase loss, under voltage, over voltage, frequency shift or unbalance condition occurs greater than the settings, the internal relay will de-energize when the adjustable Restart Delay has expired.

Both Delta and Wye systems may be monitored. In Wye systems, connections to neutral are not required.

Over/Under Voltage
Phase Loss
Phase Reversal
Phase Unbalance - 5% Fixed
Restart Delay - 2 sec. Fixed
Fault Delay - 5 sec. Fixed
Operating Ranges: 200-500VAC 3Ø
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UOA Series
 


 

The UOA Series offers protection to single phase equipment that is required to operate above a certain voltage minimum.

With Operating voltage applied above the preset PICKUP voltage, the internal relay will energize. When the voltage falls below the preset DROPOUT voltage for a period longer than the release delay, the output relay will de-energize. When line conditions return above the preset PICKUP voltage, the UOA Series automatically resets and the internal relay energizes.

The HYSTERESIS in each unit provides a differential between the PICKUP and DROPOUT trip points.

Response Times Operate: 50mSec. (Approximately) (500 mSec. on 12 VDC units)
Release: 0.5 Seconds (Approximately)
Output Rating: Style A - DPDT, 5A @ 240 VAC,
Resistive: 211 VA @ 240, Inductive.
Style N- SPDT, 10A @ 240 VAC,
Resistive; 180 VA, Inductive.
Style E - DPDT, 5A @ 240 VAC Resistive:
345 VA @ 240 VAC, Inductive.
Temperatures Operate: 0°C to +55°C
Storage: -45°C to +85°
Power Required Models Up to 110 VDC: 3 Watts, Maximum
Models Up to 300 VAC: 5 VA, Maximum
Models Over 300 VAC: 5 VA, Maximum
Agency Approval: UL Recognized File #E55826

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VBA Series
 


The VBA Series offers protection to single phase equipment that is required to operate between two voltage limits. Supply voltage is monitored for a preselected UNDER and OVER voltage limit.

With normal operation voltage applied, the internal relay will energize (PICKUP). When the voltage fall outside the preset Over/Under trip points for longer than the release delay, the relay will de-energize (DROPOUT). When line conditions return to normal, the VBA Series automatically resets and the internal relay energizes.

The HYSTERESIS in each unit on the Under and Over limits provides a differential between the PICKUP and DROPOUT trip points.

Response Times Operate: 50mSec. (Approximately) (500 mSec. on 12 VDC units)
Release: 0.5 Seconds (Approximately)
Output Rating: Style A - DPDT, 5A @ 240 VAC,
Resistive; 211 VA @ 240,
Inductive.
Style N - SPDT, 10A @ 240
VAC, Resistive: 180 VA, Inductive.
Temperatures Operate:0°C to +55°C
Storage: -45°C to +85°C
Power Required Models Up to 110 VDC: 3 Watts, Maximum
Models Up to 300 VAC: 5 VA, Maximum
Agency Approval: UL Recognized File #E55826

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