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Crompton 077-30 Switchboard Style Meter Relays.
Crompton Meter Relays have a variety of set points, with adjustable time delay
and signal inputs.  Select styles and options below.
Crompton Meter Relay, Switchboard type
Example= 077-301A-0-5Amps-0-100%-120VAC-60Hz
First **= Specify Signal input
2nd  **= Specify Scale range
3rd  **= Specify AC Power supply
4th  **= Specify Frequency
Continue to add options by descriptions below
Two relays, two set points mid band de-energized, outside band energized. Typical applications: High and Low alarm, High alarm plus shut down.
One relay, one set point, upscale energized, downscale de-energized Typical application: High alarm.
One relay, one set point, upscale de-energized, downscale energized. Typical application: Low alarm.
One relay, two set points, upscale de-energized, down scale energized. Typical applications: Liquid level control, load shedding & power factor correction.
Meter Relay Specifications   Switchboard Meter Relay Prices
Input signal ratings
Frequency monitoring: 45/65Hz or 55/65Hz
100/125 V, 200/250V380/440V or 480V system
D.C. Voltage: 10mV to 500V - 10 ./V
D.C. Current: 10µA to 15A - 20mV drop 4/20mA
A.C. Voltage: 6V to 600V - 1000 ./V
A.C. Current: 100µA to 1A - 1V drop
5A CT operation - 0.5VA
Thermocouples: Standard outputs
RTD Operation: 10Copper
100Platinum 0-200°C, 0-150°C or 20 - 140°C
Overloads: 1.2 x continuous, up to 200V or 100mA - 10 x for 10 seconds.
Set-point Adjustments: Single - 100% of scale Double - 98% of scale
Minimum span: 2% between set points
Color: Red
Output Relay: Mounted internally
Operation: SPDT contacts on each setpoint.
Optional latching on either or
both relays (077-301, 077-302
or 077-307 only)
Contact Rating: 5A, 250V, 1000W non inductive
Ambient Temperature Range: -10°C to +60°C (+14°F to 140°F)
Standard calibration: 20°C (68°F)