Pulse Isolation Relay

RPR-33PS

The SSI RPR-33PS is a three-channel pulse isolation relay that provides three isolated solid state Form C (KYZ) contacts from three Form A or C inputs. Each channel operates independently, making it a compact and efficient solution for applications requiring simultaneous isolation of multiple pulse signals.

Designed for utility metering and energy management environments, the RPR-33PS filters noise and transients on every input channel to prevent false pulses at its outputs. Its solid state construction and polycarbonate enclosure deliver dependable performance across metering, SCADA, and demand recording installations.

The RPR-33PS Pulse Isolation Relay on a white background.

Product Highlights

The RPR-33PS is purpose-built for multi-signal metering applications where three distinct pulse streams — such as KWh, KVARh, and a demand pulse — each require their own isolated output. With three fully independent channels in a single housing, it consolidates what would otherwise require multiple single-channel relays, saving panel space and simplifying wiring.

Each channel is protected by solid state switching devices rated at 800V and 750mA, with built-in transient suppression that eliminates the need for external protection components. Fused “K” output leads on all three channels, continuous LED status indicators, and a “Euro” type terminal strip make the RPR-33PS straightforward to install, monitor, and maintain in any field environment.

Features

The RPR-33PS consolidates three fully independent pulse isolation channels into a single, field-ready unit:
  • Three isolated solid state Form C (KYZ) outputs from three Form A or C inputs
  • Each channel fully independent with its own input and output
  • Input noise and transient filtering on each channel to eliminate false pulses
  • Solid state switch rated at 800V / 750mA with built-in transient protection
  • Fused "K" output leads (½ amp, 3AG) on each channel
  • 2,500Vrms input/output isolation voltage
  • Red and green LED status indicators
  • Available in 24 VAC/VDC and 125 VDC input voltage options
The RPR-33PS Pulse Isolation Relay

Three-Channel Independent Pulse Isolation

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