All three are single-phase (220V) electricity meter boxes with one meter per unit and utility-consumer physical separation, but they differ in locking and mounting details: (1) DBX-2000 — the standard, most economical variant. Wall-mounted only, IP30/IP40, cold-rolled steel or ABS plastic. The metering compartment locking is a utility-standard padlock hasp or triangle-key lock. Consumer MCB is housed in a separately accessible cover. (2) DBX-3000 — same core specs but offers surface OR flush (recessed) mounting and supports 1P or 1P+N consumer MCB. Its meter compartment uses a utility-standard lock or padlock hasp and includes a dedicated, separately-door consumer compartment. Choose DBX-3000 where recessed mounting is architecturally required. (3) GHBX — emphasizes a transparent polycarbonate reading window and anti-tamper design with dedicated phase/neutral/earth connection points; its layout is optimized for clean wiring and visual reading. Choose GHBX for a transparent-window-first aesthetic and simplified wiring. All three accept DIN-rail or base-mounted meters and comply with IEC 61439 / GB/T 7251. The DBX-2000 is the cost-effective default; DBX-3000 adds flush-mount flexibility; GHBX optimizes the window and wiring layout.

A triangle-key lock (also called a triangular socket lock or utility lock) is a keylock whose keyway has a triangular (or similarly shaped) profile, opened by a matching universal triangle key carried by utility field staff. It is widely used on metering enclosures in many regions because: (1) Universal access — all utility staff use the same standard triangle key, so no individual key management or keyed-alike system is needed; any authorized utility worker can open any meter box. (2) Consumer-proof — the consumer does not possess the triangle key, so the metering compartment remains inaccessible. (3) Reusable — unlike wire-and-seal (which must be broken and replaced each time the compartment is opened), the triangle-key lock can be opened and re-locked repeatedly without consumables, making it convenient for frequent meter reading or maintenance. (4) Less tamper-evident than a seal — a triangle-key lock does not leave visible evidence of opening, so it is used where utility trust in authorized access is high. When ordering, specify whether your utility requires padlock hasp, wire-and-seal, or triangle-key lock, as this is often mandated by local electricity supply regulations.

The utility-consumer physical partition is a regulatory requirement in most electricity supply jurisdictions for revenue-metering installations. Its purpose is to: (1) Prevent meter tampering — the consumer cannot access the meter terminals, CT connections, or the incoming supply cable, eliminating the possibility of bypassing the meter or altering its readings. (2) Define ownership and responsibility — the utility owns and maintains everything upstream of and including the meter; the consumer owns and is responsible for everything downstream (outgoing MCB and internal wiring). (3) Enable sealing or keyed locking — the utility compartment is sealed or locked (padlock, wire-and-seal, or triangle-key), so any unauthorized access is controlled. (4) Allow consumer reset of the MCB — the consumer can reset a tripped outgoing MCB without needing utility access or breaking the meter seal. Without this partition, the consumer could potentially tamper with the meter, leading to revenue loss for the utility and safety hazards from improper modifications.

Yes. The DBX-2000 is compatible with both electronic (smart) and mechanical single-phase meters, supporting either DIN-rail mounting (the most common for modern electronic meters) or base mounting (for traditional meters with screw terminals). For smart meters that require communication wiring (RF, PLC, or cellular modules), ensure adequate space is reserved inside the metering compartment for the communication antenna or module — this is usually not an issue with standard form-factor meters. When specifying, indicate the meter brand and model so we can confirm the mounting type (DIN-rail vs. base) and dimensions. Note that for smart meters with remote disconnect relays, the incoming supply switching is performed by the meter itself, so the separate utility-side isolator or MCCB may be optional — confirm with the utility's metering specification.

No. The DBX-2000 is specifically designed for single-phase (220V/230V/240V) metering only. It accommodates one single-phase meter per unit and is rated for up to 100A main current. For three-phase (380V/400V) metering applications — residential units with three-phase supply, small commercial premises with three-phase loads, or industrial customers — a three-phase meter box is required. GOHO's JP series outdoor distribution box includes three-phase metering configurations, and for indoor three-phase metering we can supply a custom three-phase meter box based on the XL-21 or GHM platform with a meter compartment. When requesting a three-phase metering solution, specify the voltage (380V/400V), current rating, whether CT (current transformer) metering is required for high currents, and the utility-consumer separation requirements. Do not attempt to use the single-phase DBX-2000 for three-phase service, as this would create a serious safety and regulatory non-compliance issue.

The device selection depends on the utility's requirements and the consumer's load: (1) Incoming (utility-side) device — typically a double-pole isolator or a double-pole MCCB rated up to 100A. The isolator provides a visible break point for safe isolation; the MCCB adds overload and short-circuit protection on the supply side. The utility usually specifies which type is required. If the incoming supply is protected by an upstream device (e.g., the building's main distribution board), an isolator may be sufficient. (2) Outgoing (consumer-side) device — a single-pole (1P) or 1P+N MCB rated up to 63A, with a trip curve (B, C, or D) selected based on the load type. For typical residential installations, a 32A–63A Type C MCB is common. The MCB rating should be matched to the consumer's main cable size and the total connected load. We can supply the DBX-2000 empty (for on-site device installation) or fully pre-wired with the specified incoming and outgoing devices. Always confirm device requirements with the local utility company before ordering, as metering installation standards vary by region.