The RST 25 Phase Sequence Relay is a reliable electronic voltage protection device designed to protect three-phase electrical equipment from phase sequence errors, phase loss, and voltage imbalance. This relay ensures safe operation of motors, compressors, pumps, and industrial machinery by disconnecting power during faulty conditions.
The RST-25 phase protection relay continuously monitors three-phase supply parameters and activates protection when incorrect phase sequence, missing phase, or abnormal voltage is detected. It helps prevent costly motor damage, downtime, and electrical hazards.
With its compact DIN-rail mount design, the relay is easy to install inside control panels and switchboards. It is widely used in factories, workshops, HVAC systems, elevators, and automation panels. Electricians and automation engineers prefer this relay due to its stable performance and dependable protection.
Whether for new installations or replacement of existing protection devices, the RST 25 Phase Sequence Relay is an essential component for industrial electrical safety.
Features:
- ZAHRA RST-25 Voltage Relay Three Phase A+ Quality
- Electronic Voltage Protection Phase Sequence Relay
- Model Name: Zahra RST-25
- The electronic phase failure relay RST 25 offers phase failure, phase shift, phase flashing, asymmetric, phase sequence, and also under and over-voltage control
- The RST 25 can be connected as follows in the installation diagram:
- When the relay is connected as in FIG 1, the three yellow LED’s L1, L2, and L3 light up when the power supply A1 phase L, the A2 Neutral, and the three phases “L1”, “L2” and “L3” are properly connected.
- If there is no under of over-voltage, phase failure of phase sequence, the green LED lights up, (terminals 11 and 14 are closed) and the relay is ready for operation.
Specification:
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Model: RST-25
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Product Type: Phase Sequence / Voltage Protection Relay
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Phase: Three Phase
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Mounting: DIN Rail
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Application: Electrical Protection
Uses:
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Three-phase motor protection
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Industrial automation panels
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Pumps and compressors
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HVAC and elevator systems
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Power distribution and control panels
Package Include:
1 x RST 25 Phase Sequence Relay, Electronic Voltage Protection
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