3-Phase Monitor

 

• Detects Phase Loss or Reversal and Low Voltage
• 400Hz and Gold Contact Options
• Automatic or Manual Reset
• UL Recognized and CSA Certified

 

Description

The Model 263 continuously monitors 3-phase power systems for phase loss, low voltage and phase reversal. The monitor consists of a solid-state sensing circuit, driving an electromechanical relay.

Applying correct voltage and phase rotation energizes the relay. When properly adjusted, a fault condition will cause the relay to de-energize, even when regenerated voltage is present.

When the fault is corrected, the Model 263 automatically resets. A manual reset version is also available. The SG Model has silver with gold flash contacts for low current applications.

The Model 263 does not require a neutral connection, and can be used on Wye or Delta systems. Each of the five different voltage ranges is adjustable to allow the monitor to be set for existing conditions. NORMAL and TRIP LED indicators are provided to aid in adjustment and system troubleshooting.

 

Specifications

AUTO Reset	A263	B263	C263	D263	EX263
MANUAL Reset	A263M	B263M	C263M	D263M	EX263M
GOLD-AUTO Reset	A263SG	B263SG	C263SG	D263SG	EX263SG
GOLD-MAN Reset	A263SGM	B263SGM	C263SGM	D263SGM	EX263SGM
Nominal AC voltage (phase to phase)	120VAC	208/240VAC	480VAC	575VAC	380VAC
Adjustment Range	85-120V	160-240V	380-480V	450-575V	300-400V
Frequency	60Hz	60Hz	60Hz	60Hz	50Hz
Power Consumption	0.75W	1.5W	4.5W	7.5W	4.5W
Transient Protection	2500 VRMS for 10ms
Repeat Accuracy	± 0.1% of setpoint (fixed conditions)
Response Time	50ms
Dead Band	Approximately 2%
Output Contacts	All SG models: SPDT silver w/gold flash 5 amps at 240VAC resistive All other models: SPDT 10 amps at 240VAC resistive
Expected Relay Life	Mech: 10 million operations Elec: 100,000 operations at rated load
Operating Temp	- 20° to +131° F
Humidity Tolerance	0 - 97% w/o condensation
Enclosure Material	ABS plastic
Mounting	Surface
Weight	9.5 oz
Agency Approvals	ALL VERSIONS - UL Recognized and CSA Certified

Downloads

Document	File Type	File Size	Download
Model 263 Datasheet	PDF	566 KB

© 2023 Relay Specialties, Inc.
17 Raritan Road, Oakland, NJ 07436 | 800-526-5376
Created By: G.Dezines