Furse ESP 240 Type 2 SPD Surge Diverter, 230V Distribution Board

The Furse ESP 240 series provides robust electrical surge diverter solutions for 230 V single-phase installations at the service entrance. Designed to mitigate transient overvoltages, these Type 2 spd units safeguard sensitive automation equipment from partial lightning currents and induced switching spikes.

Modern industrial automation facilities face critical downtime risks from transient overvoltages entering through service entrances or induced via adjacent power lines. The Furse ESP 240 D1/M1/T3 range addresses these challenges by employing a coordinated multi-stage protection architecture adhering to BS EN 62305 and BS 7671 wiring regulations. Working on single-phase 230 V networks, these devices handle both direct impulse currents and indirect 8/20 waveforms. Active status indication parameters instantly report system irregularities, including loss of power, phase failure, or abnormal neutral-to-earth voltage spikes, ensuring uninterrupted monitoring for facility engineers.

Technical Specifications

Nominal Voltage Phase to Neutral Uo: 240 VAC @ 50 Hz / 60 Hz

Maximum Continuous Operating Voltage Uc: 280 VAC @ 200 - 280 V

Arrester Class Type: Type 1 + 2 + 3 @ BS EN 61643

Impulse Discharge Current Iimp: 12.5 kA @ 10 / 350 µs waveform

Nominal Discharge Current In: 20 kA @ 8 / 20 µs waveform

Maximum Discharge Current Imax: 40 kA @ 8 / 20 µs waveform

Voltage Protection Level Up: < 600 V @ Full Mode Protection

Short Circuit Withstand Capability: 25 kA @ 50 Hz

Maximum Back-up Fuse Rating: 125 A @ gL type

Leakage Current to Earth: < 250 µA @ Normal Operating Voltage

Indicator Circuit Current: < 10 mA @ Operational State

Volt-Free Contact Rating: 1 A @ 250 VAC (RMS)

Ambient Operating Temperature Range: -40°C - +80°C @ Operational

Enclosure Protection Rating: IP20 @ IEC 60529

Conductor Size Cross Section: 25 mm² max stranded @ Screw Terminals

Tightening Torque: 4.5 Nm max @ Terminal Lugs

System Integration and Hardware Setup

Proper installation of the surge diverter requires strict adherence to short, straight cabling practices to minimize inductive voltage drop during high-frequency transients. The device is mounted on a standard 35 mm top-hat DIN rail inside the main distribution board or a dedicated weatherproof enclosure. Connect incoming live, neutral, and earth conductors directly to the designated terminals using stranded copper cables up to 25 mm², applying a maximum tightening torque of 4.5 Nm. For low-current spurs or socket distribution up to 16 A, variants like the ESP 240T3/SKT or inline models (ESP 240D-10A and ESP 240D-32A) integrate directly into sub-distribution feeds. The built-in changeover volt-free contact allows seamless integration with programmable logic controllers or building management systems, transmitting active pre-failure warnings and phase-loss alerts via simple screw terminal wiring.

Reliability and Environmental Durability

Engineered for harsh industrial environments, the assembly features a robust housing construction that withstands ambient operating temperatures ranging from -40°C to +80°C. Internal multi-stage thermal disconnect mechanisms safely isolate degraded components during sustained overvoltage events without risking thermal runaway or compromising foundational electrical safety. The integrated three-way visual status indicator provides clear diagnostics: green indicates full protection capability, green and red combined signal reduced protection requiring scheduled replacement, and solid red signifies end-of-life status. Furthermore, active warning features detect hazardous neutral-to-earth potential shifts caused by wiring errors or severe phase unbalance, protecting downstream automation assets and minimizing unplanned industrial maintenance overhead.

Selection Guidance and Alternative Options

Selecting the correct surge protection device depends on the facility's lightning protection level, structural risk assessment, and proximity to incoming service lines under BS EN 62305. Main distribution boards facing high exposure benefit from high-capacity modules like the ESP 240 D1 or M1, whereas localized socket spurs and sensitive terminal loads require dedicated downstream variants such as the ESP 240T3/SKT or fused in-line alternatives (ESP 240D-10A and ESP 240D-32A). For customers seeking professional cross-reference verification or localized sourcing, Beijing Zhongping Technology maintains extensive regional ready-to-ship inventory and offers expert technical engineering support to match exact electrical parameters.

Frequently Asked Questions (FAQ)

1. What is the primary function of the Furse ESP 240 surge diverter in a 230 V network?

It provides combined Type 1, 2, and 3 protection at service entrances or sub-distribution boards, safely diverting direct lightning currents and induced transient overvoltages away from sensitive single-phase automation electronics.

2. What are the delivery lead times and stock availability for this series through your distribution channels?

Beijing Zhongping Technology stocks original Furse components locally, enabling rapid order processing and immediate dispatch for standard industrial part numbers.

3. How does the Full Mode protection architecture operate across conductors?

The Full Mode design delivers enhanced low let-through voltage protection across all coupling modes, including phase-to-neutral, phase-to-earth, and neutral-to-earth paths.

4. What do the different LED status indicators signify during routine operation?

A green display confirms full protection status, a combined green and red light indicates reduced protection capacity requiring unit replacement, and a red indicator points to complete protection loss.

5. Can the volt-free contact be tied into an external PLC or alarm system?

Yes, the integrated changeover volt-free contact connects directly to building management systems or external buzzers to signal pre-failures, phase loss, or blown fuses.

6. What is the recommended backup fuse rating for installing this surge diverter?

The device requires an external backup fuse not exceeding 125 A gL to ensure proper short-circuit coordination and safe electrical isolation during extreme fault conditions.

7. How should the unit be wired to minimize inductive voltage accumulation?

Installers must keep connecting leads as short, straight, and direct as possible, or utilize series connection configurations on lower current supplies to eliminate additive lead voltages.

8. Does this device offer protection against dangerous neutral-to-earth voltage faults?

Yes, the unit features an active warning mechanism that flashes to alert operators of potentially hazardous neutral-to-earth voltage abnormalities resulting from wiring or grounding errors.