Low Voltage Switchgear & Accessories

Low Voltage Switchgear & Accessories — Category Overview

Low Voltage Switchgear & Accessories covers the complete range of equipment used to control, protect, and distribute electrical power in systems operating up to 1,000V AC. This product category includes air circuit breakers, moulded case circuit breakers, drawout switchgear cabinets, withdrawable drawer functional units, busbar support systems, current transformers, operating mechanisms, racking mechanisms, and a full range of mechanical cabinet hardware — all rated and tested to work together as a coordinated LV distribution or motor control assembly.

When specifying Low Voltage Switchgear & Accessories for a distribution board or motor control centre, the critical constraint is not breaking capacity alone — it is how each component interacts with upstream protection coordination, downstream load behaviour, and the thermal environment inside the assembled enclosure. Selecting products rated and tested as a system, rather than assembled from separate catalogue sources, reduces the risk of mismatches that are costly to resolve after delivery.

All Low Voltage Switchgear & Accessories in this range comply with IEC 60947-2 for circuit breakers, IEC 61439 for low-voltage switchgear assemblies, and IEC 61869-2 for current transformers — providing a verified standards framework for buyers in IEC-aligned markets including Southeast Asia, Eastern Europe, the Middle East, and Africa.

Key Products in the Low Voltage Switchgear & Accessories Range

Circuit Breakers

• MOW-1 Air Circuit Breaker: Rated 630A to 6300A, Icu to 120kA, Icw to 100kA for 1 second. Available in drawout and fixed configurations with electronic trip units providing protection selectivity, metering, and Modbus communication. IEC 60947-2.
• MOM-1 Moulded Case Circuit Breaker: Rated 16A to 1600A, up to 100kA Icu, with thermal-magnetic and electronic trip options. Published derating data for hot switchrooms is included — a relevant specification point for installations in climates regularly exceeding 40°C ambient.

Drawout Cabinet and Drawer System

• M-Blokset Drawout LV Switchgear Cabinet: 380V–415V, up to 2500A, 73.5kA peak short-circuit withstand, IP20 to IP54. Weld-free 8MF frame with ZM busbar clamps and plug-in modules. Verified to IEC 61439. Available as complete cabinets or CKD flat-pack kits for local assembly.
• Withdrawable Drawer Units: Half-unit (63A), 1-unit (160A), 1.5-unit (250A), and 2-unit (up to 400A). Compatible with GCK, GCS, and MNS switchgear. Silver-plated isolating contacts, factory wired and tested. CKD kits available.
• Blokset Drawer Modules: 4M/2 half-width (400mm, to 160A), 3M full-width (300mm, to 250A), 6M full-width (600mm, to 630A). Weld-free construction, 73.5kA peak, three-position isolation, individually tested.

Busbar Support and Insulation

• Busbar Holders: Flame-retardant moulded, 1 to 4 bars per phase, 73.5kA peak with ZM clamps. Includes spacing tables.
• Busbar Standoff Insulators: SMC and DMC moulded, high tracking index, M6–M12 inserts, rated as a system for fault withstand.

Current Transformers and Mechanisms

• BH-0.66 Current Transformer: 0.66kV, 5A to 5000A, accuracy class 0.2S/0.5/0.5S/1.0 and protection 5P10/10P10. IEC 61869-2. Bar and window types.
• Manual Operating Mechanism: Rotary handle, door interlock, padlocking. Fits MCCB and switch-disconnector frames.
• Hand-Pull Racking Mechanism: Three-position Connect/Test/Disconnect, positive latching, padlocking. 100,000 cycles rated.
• Plug-in Isolating Contacts: Silver-plated, spring-loaded, self-aligning. 100,000 cycles rated.

Cabinet Hardware

• Handles and Locks: Swing, L, and T handles; cam locks and 3-point latch systems with keyed alike and master key options. Zinc alloy and stainless steel. IP65.
• Cable Clamps and Cleats: Single, trefoil, and multi-cable configurations, steel and polymer, short-circuit force rated.
• General Accessories: Hinges, gaskets, gland plates, mounting plates, DIN rail, cable trunking, earth studs, plinths, and door hardware.

Common Applications for Low Voltage Switchgear & Accessories

Low Voltage Switchgear & Accessories from this range is used in commercial buildings, industrial manufacturing facilities, data centres, infrastructure power distribution, and motor control applications. The withdrawable drawer system — from half-unit to 2-unit functional units compatible with GCK, GCS, and MNS switchgear — is particularly suited to motor control centres where individual circuits must be isolated and maintained without shutting down adjacent feeders.

A frequent site issue is discovering that the enclosure IP rating specified at design stage does not reflect the actual installation environment. An enclosure rated IP20 for an assumed dry indoor location may end up adjacent to a process area with wash-down risk or condensation from thermal cycling. Checking IP requirements against the real environment — not only the schematic annotation — is a verification step that experienced panel builders carry out before accepting delivery.

This Low Voltage Switchgear & Accessories range is supplied to electrical accessories wholesalers, cabinet manufacturers, electrical maintenance companies, and installation contractors in markets including Russia, Brazil, Chile, Peru, Egypt, Kenya, Indonesia, Vietnam, Thailand, Turkey, and Poland.

How to Select Low Voltage Switchgear & Accessories

Step 1 — System voltage and rated current. Confirm the distribution voltage (380V, 400V, or 415V) and the maximum continuous current at each circuit level. Low Voltage Switchgear & Accessories in this range spans 16A to 6300A across MCCB and ACB product lines. One point to verify before confirming the rating: nameplate current on IEC products is declared at a 40°C ambient reference. In hot climates regularly reaching 45°C or above, the effective safe continuous load is lower. Derating data for the MOM-1 MCCB in elevated ambient conditions is published — apply this before confirming frame selection.

Step 2 — Fault current and protection coordination. Confirm the prospective short-circuit current at the installation point. The MOW-1 ACB provides Icu to 120kA and Icw to 100kA for 1 second for main incomer use; the MOM-1 MCCB provides up to 100kA Icu for feeder protection. The Blokset frame with ZM busbar clamps is rated to 73.5kA peak, providing a defined fault withstand level at the busbar.

Step 3 — Enclosure form factor and drawer configuration. Fixed configuration suits low-maintenance-frequency circuits; drawout configuration is suited to motor control centres where individual circuits need isolation and servicing without shutting down the whole panel. Blokset modules and withdrawable drawers both provide three-position isolation (Connect/Test/Disconnect).

Step 4 — Accessories matched to installation conditions. Select enclosure IP rating against the actual environment. Specify busbar standoff insulator grade — SMC or DMC — against the tracking index requirement of the site. For cable entries, specify cleat type and material based on cable OD and the applicable short-circuit force rating.

Step 5 — Standards compliance for the target market. Under IEC 61439, Low Voltage Switchgear & Accessories assemblies must be verified as complete systems, not only as individual component declarations. For buyers in markets with additional national requirements — GOST in Russia, INMETRO-related requirements in Brazil — confirm that type test reports and certificates are available before order placement. Requesting this documentation at the RFQ stage avoids delays at technical submittal review.

Why This Low Voltage Switchgear & Accessories Range Matters

The LV switchgear accessory market is characterised by high purchase volumes and price-sensitive decisions driven by BOM consistency and dimensional compatibility. Panel builders producing standardised distribution boards and motor control centres depend on repeatable dimensional tolerances between delivery batches. Batch-to-batch variation in accessories — busbar holders, standoff insulators, handles, or locking mechanisms — forces panel redesign or manual fitting adjustments that disrupt production and create hidden assembly costs.

Sourcing Low Voltage Switchgear & Accessories from a single supply arrangement — covering circuit breakers, busbar systems, withdrawable drawers, racking mechanisms, operating mechanisms, cabinet hardware, and current transformers — reduces coordination overhead and simplifies incoming inspection against a unified documentation set.

For electrical wholesalers and distributors serving maintenance companies or installation contractors, range depth within this Low Voltage Switchgear & Accessories catalogue — from a 63A half-unit withdrawable drawer to a 6300A air circuit breaker, and from a cam lock to a complete IEC 61439-verified drawout cabinet — allows multiple project specifications to be sourced without switching vendors, supporting more predictable lead time planning for project buyers.

Zhejiang Xianghong Electric Co., Ltd, established in 1995 and based in Yueqing, Zhejiang, China, has supplied low-voltage and medium-voltage switchgear products to international markets for over 25 years. Supply is available as factory-assembled and tested complete panels or as CKD flat-pack kits for local panel builders.