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SPR-3LD
Solid State Pulse Isolation Relay

SPR-3...click for a larger view

Typical applications include interfaces between utility metering devices and customer-owned energy control systems, demand recorders, or supervisory control systems (SCADA) interfaces.

The SPR-3LD relay is designed to filter noise and transients from its input to prevent false pulses at its output. Bright red and green LED lamps indicate the system’s status at all times thus allowing a rapid visual check of the system’s performance without requiring any additional test equipment.

The SPR-3LD’s input and output circuit’s terminal strip connector is a “EURO” type providing excellent insulation. The “K” lead of the SPR-3LD’s output is fused to prevent damage to the relay under almost any conditions a user might cause such as excessive current, incorrect wiring, etc.  The SPR-3LD’s robust solid-state switching devices are rated at 400V and 150mA giving maximum protection from lightning or transient voltage damage. Its built-in transient protection for the solid-state switch contact eliminates the need for external or off-board transient suppression devices.  All component parts that have power applied to them, with the exception of the input/output terminal strip are enclosed in a polycarbonate cover for maximum protection. The mounting base plate is also made of polycarbonate and offers excellent electrical insulation between the circuit and the mounting surface. 

SPECIFICATIONS



ELECTRICAL
Power Input: 90 to 300 VAC Burden: 10 mA at 120 VAC
Pulse Input:
One Form C (3-Wire) input on the Y & Z input terminals
Pulse Output:
 Three sets of Form C dry contacts (K, Y & Z) for energy pulses. The solid state “no bounce” relay contacts are rated at 250 VAC/VDC @ 1/10 Amp. The maximum rating of the contacts is 800mW.  Factory fused at 1/10 amp. (3AG)
Contact On-State Resistance:
 25 ohms maximum, 18 typical
Insulation Resistance:
 50 megohms typical
Operate and Release Time:

Turn-on time – 2-3 mS typical, 5 mS max
Turn-off time – 2-3 mS typical, 5 mS max
Input/Output Isolation Voltage: 2500V

MECHANICAL
Mounting: Any position
Size: 3.27” wide, 5.65” high, 1.50” deep
Weight: 12 ounces

TEMPERATURE
Temperature Range: -38° C to +85° C, -36.4° F to +158° F
Humidity: 0 to 98% non-condensing

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