Hager SR151 Hager Low-Voltage Protection and Distribution

Razz Middle East supplies Hager low-voltage protection and distribution equipment across Saudi Arabia. The range covers miniature circuit breakers, residual current devices and combined RCBOs, moulded case breakers, distribution boards and enclosures, modular contactors, timers and metering devices for DIN-rail mounting. Items are sourced to order against the exact Hager reference and delivered duty-paid to site.

Hager SR151

This page covers Hager part number SR151 — Hager Low-Voltage Protection and Distribution. Quote the full part number with your enquiry and the item is unambiguous: one part number identifies one exact product variant, including options that are not visible in the description.

About Hager Low-Voltage Protection and Distribution

A miniature circuit breaker is defined by three values that must all be right. The rated current sets the continuous load it will carry. The tripping curve sets how quickly it responds to a multiple of that current, with a B curve for resistive and lighting circuits, a C curve for general and small motor loads, and a D curve for transformers and high inrush equipment; fitting a C curve where a D was specified produces nuisance tripping on energisation, and the reverse leaves cable protection slower than intended. The breaking capacity must exceed the prospective short-circuit current at that point of the installation. Residual current devices add earth leakage protection at a defined sensitivity, and their type matters: an AC type responds only to sinusoidal residual current, while an A or B type is needed downstream of electronic loads, drives and chargers that produce pulsed or smooth DC residual components. RCBOs combine both functions in one module width. Distribution boards are specified by way count, incomer arrangement and enclosure rating.

Hager Low-Voltage Protection and Distribution in Saudi Arabia

Modular protection devices of this kind are fitted throughout Saudi building electrical installations. Villas, apartment blocks, offices, clinics, hotels, schools and retail units use distribution boards populated with miniature circuit breakers and residual current protection on final circuits. Commercial and industrial buildings use them in sub-distribution downstream of the main switchboard fed from the SEC supply. Contractors on new construction, including the developments at NEOM and along the Red Sea coast, install them in volume. Two local conditions matter to selection. Distribution boards in Saudi buildings frequently sit in unconditioned service risers and external walls where enclosure temperature is high, and breaker current ratings are stated at a reference ambient, so the effective rating is lower than the printed figure. The supply is 220/230 V single phase and 380/400 V three phase at 60 Hz. Devices supplied into Saudi projects are subject to SASO conformity requirements.

Ordering and lead time

Quote the Hager reference as printed on the device, for example LS501, LF304G or ERC425. If the reference is unavailable, give the full set of defining values rather than the current alone: rated current, number of poles, tripping curve as B, C or D, and breaking capacity required at that point of the installation. For residual current devices, state the sensitivity in milliamps, the type as AC, A or B depending on the loads downstream, and whether time delay is required for discrimination with an upstream device. For distribution boards and enclosures, give the number of modules or ways, the incomer arrangement, the mounting as flush or surface, and the required ingress rating. Busbar combs, terminal shrouds and auxiliary contacts are separate references. Items are sourced to order with a typical lead time of three weeks and delivered duty-paid to site.

Specifications are taken from the supplier's published catalogue data. Confirm against the manufacturer's current datasheet before ordering.