Stefan Products

Current Transformers

Current transformers step down higher primary currents to protect measuring instruments against high currents, available as moulded case or split core types for new and existing installations.

• 40A – 6,000A range • Moulded case & split core • Class 0.5, 0.2S, 1 accuracy

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CBCT & ELR

Core balanced current transformers paired with earth leakage relays for sensitive fault detection, with configurable trip levels and time delay.

• ST-CBT35, 70, 120, 210, 310 • 35mm – 310mm inner diameter • Earth leakage relays

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Analog & Digital Meters

Analog and digital meters for panel-mounted measurement of current, voltage, power factor, and frequency, with communication support for remote monitoring.

• 72x72 & 96x96 sizes • RS485 Modbus protocol • CT primary 5A – 10,000A

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Modular Contactors

Modular contactors for switching single and three phase low power loads, combinable with auxiliary control, protection, and indication functions.

• Single & three phase • Auxiliary control & protection • Lighting, heating & ventilation loads

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Relays

Reliable relays for electrical control and automation, including under voltage protection and general-purpose relay & base configurations.

• 8-pin & 14-pin bases • AC & DC coil voltages • Adjustable restart delay (5–15 min)

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Door Limit Switches

Door limit switches that simulate contact changeover without acting on the plunger, letting staff safely work inside an electrical board with the door open.

• IP65, water & oil-proof • 690V rated insulation • IEC 947-5-1 compliant

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