Product Description

TERASAKI ESM-1152 Earth Leakage Relay

The TERASAKI ESM-1152 is an electronic earth leakage relay designed to provide reliable protection against earth fault currents in electrical installations. It continuously monitors the system for leakage currents using an associated Zero Phase Current Transformer (ZCT). Featuring adjustable sensitivity (IΔn) and time delay (Δt) settings via front-panel rotary switches, the ESM-1152 allows for precise configuration according to specific protection requirements. Housed in a compact DIN rail mountable enclosure, it is suitable for various industrial and commercial applications, enhancing electrical safety by detecting potentially hazardous earth faults and tripping an associated circuit breaker or contactor. LED indicators provide clear status information for power, pre-alarm (optional), and trip conditions.

Technical Specifications:

Type: Electronic Earth Leakage Relay (ELR)
Model Series: ESM / TemProtect
Mounting: DIN Rail
Control Supply Voltage: Varies by specific model (e.g., 100-240V AC/DC, 24-48V AC/DC)
Operating Frequency: 50/60 Hz
Adjustable Sensitivity (IΔn): Typically 0.03A to 30A (model dependent range)
Adjustable Time Delay (Δt): Typically 0s to 5s (model dependent range)
Output Relay Contacts: Typically 1 C/O or 2 C/O (model dependent)
Associated ZCT: Requires external Terasaki ZCT (Zero Phase Current Transformer)
Reset: Manual / Auto (selectable or model dependent)
Indicators: LEDs for Power ON, Pre-alarm (optional), Trip
Standards Compliance: Conforms to relevant IEC standards (e.g., IEC 60947-2 Annex M)