Schneider Electric Vigirex RH197M Ground Fault Relay

Overview

The Schneider Electric Vigirex RH197M Ground Fault Relay is a standalone residual current monitoring relay used with an external toroidal sensor to detect earth leakage current on medium and low-voltage circuits without directly breaking the load current itself. For protection engineers in Oman and the GCC, the RH197M provides flexible, adjustable ground fault detection on feeders where an integrated RCBO is impractical, such as large power circuits or motor feeders protected by a separate circuit breaker.

With engineering support in Muscat, Seven Star LLC supplies the Schneider Electric Vigirex RH197M Ground Fault Relay residual current ground fault monitoring relay to industrial, commercial, and utility customers across the Sultanate of Oman and the wider GCC. Every unit is supplied on request with full technical documentation and local application support, giving panel builders and facility engineers in Oman confidence in their residual current ground fault monitoring relay investment from procurement through commissioning.

Operating Principle

The Vigirex RH197M connects to an external toroidal current transformer clamped around the phase conductors, which senses the vectorial sum of currents flowing through the circuit. Under healthy conditions this sum is zero; when insulation degradation or an earth fault causes leakage current to flow to ground, the toroid detects the resulting imbalance and sends a signal to the RH197M relay for evaluation against its configured threshold and time delay.

Unlike an integrated RCBO, the Schneider Electric RH197M does not switch the load itself; instead it issues a trip signal to an associated shunt-trip circuit breaker or contactor, which allows the sensitivity and time delay to be adjusted independently of the breaker’s own overcurrent settings. This separation gives protection engineers far greater flexibility to tune ground fault sensitivity for selective coordination across multiple levels of a distribution system, an approach commonly used in Oman’s larger industrial and utility installations.

Engineering Design of the Schneider Electric Vigirex RH197M

The Vigirex RH197M is housed in a compact DIN-rail relay case with a front-panel display and adjustment controls for setting sensitivity thresholds and trip time delays independently, giving commissioning engineers fine control over coordination between multiple ground fault relays in a layered distribution system. Status indicators show fault presence, pre-alarm, and trip conditions clearly, letting maintenance staff diagnose insulation degradation before it develops into a full fault.

Output contacts on the Schneider Electric RH197M are configurable for alarm-only signaling or direct tripping of an associated breaker, and the relay supports connection to a range of toroidal sensor sizes to match cable or busbar dimensions on the protected circuit. This flexibility lets the RH197M be retrofitted onto existing switchboards in Oman’s process plants without replacing the protected breaker itself.

Key Features

The Schneider Electric Vigirex RH197M Ground Fault Relay is built around design priorities that matter most to ground fault monitoring specifiers in Oman and the GCC:

• The Vigirex RH197M provides adjustable ground fault sensitivity independent of the protected breaker’s overcurrent settings.
• Independently configurable time delay supports selective coordination across multiple protection levels.
• Compatibility with a range of external toroidal sensors matches cable and busbar dimensions on site.
• Front-panel indicators clearly distinguish pre-alarm, fault, and trip conditions.
• Configurable output contacts support alarm-only signaling or direct breaker tripping.
• Standalone relay design allows retrofit onto existing switchboards without replacing the breaker.
• Compact DIN-rail housing simplifies integration into new or existing protection panels.
• Test functions allow commissioning engineers to verify trip response without an actual ground fault.

Industrial Applications

The Schneider Electric Vigirex RH197M Ground Fault Relay is specified on medium-voltage feeders, large motor circuits, and utility distribution systems across Oman, wherever ground fault protection must be layered and selectively coordinated across multiple points in the network rather than handled by a single integrated device. Protection engineers in Sohar’s industrial zone rely on the RH197M for early detection of insulation degradation before it escalates into equipment damage or unplanned outages.

Backed by genuine manufacturer documentation, Seven Star LLC distributes the Schneider Electric Vigirex RH197M Ground Fault Relay to panel builders, MEP contractors, and plant operators throughout Muscat, Sohar, and Salalah, supporting district cooling plants, RO desalination facilities, oil and gas installations, commercial towers, and hospital complexes across the GCC. Our technical team supports specifiers in Oman who source the Schneider Electric Vigirex RH197M Ground Fault Relay, with lead time and availability confirmed at quotation.

Technical Specifications

The table below summarizes the key technical parameters of the Schneider Electric Vigirex RH197M Ground Fault Relay relevant to specification and procurement.

Request a Quote for Schneider Electric Vigirex RH197M Ground Fault Relay

Facility engineers and procurement teams in Oman and across the GCC can request a formal RFQ for the Schneider Electric Vigirex RH197M Ground Fault Relay directly from Seven Star LLC’s instrumentation and low-voltage division. We supply on request with lead time confirmed at quotation, provide the full technical datasheet on request, and offer pre-sales engineering support to confirm compatibility before order placement. Working closely with plant engineers in the region, Seven Star LLC supports the Schneider Electric Vigirex RH197M Ground Fault Relay across its full lifecycle, from specification and quotation through delivery, commissioning assistance, and after-sales spares.

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