Product Overview
The floor-standing boundary-switch integrated prepaid metering and billing device is a product that converts the pole-mounted HV metering, switch and control box into a cabinet-type structure, composed of an integrally cast dry-type HV metering box and a ZW32F intelligent boundary switch, with the cabinet made of stainless steel or plastic-sprayed iron plate. The product is easy to install and elegant in appearance; the HV part is completely separated from the LV metering chamber, and the HV chamber door cannot be opened while the equipment is live — it can only be opened when power is off, which is safe and reliable. The product occupies a small area and is a perfect combination product for residential areas and industrial & mining enterprises used together with box-type substations. Personnel can open the door directly to read the meter and operate the switch locally. The instrument transformers adopt fully enclosed epoxy-resin vacuum casting, eliminating aging problems. The boundary switch part adopts a vacuum switch with zero-sequence and protective current transformers, and together with the intelligent controller provides zero-sequence, over-current and instantaneous protection, automatically removing single-phase-to-earth faults and automatically isolating phase-to-phase short-circuit faults, ensuring supply safety of non-fault customers. The product has FTU functions for remote closing/opening of the switch, and also GPRS remote control (see "Intelligent controller description" below). The floor-standing boundary-switch integrated prepaid metering and billing device is suitable for places below 3000 m altitude with ambient temperature -40℃ to +40℃.
Service Conditions
- a. Altitude not exceeding 3000 m; pollution degree: Ⅳ.
- b. Ambient air temperature: -40℃ to +40℃; daily temperature variation: 25℃.
- c. Wind speed not exceeding 35 m/s; seismic intensity not exceeding degree 8.
- d. Places free from flammable, explosive and chemically corrosive hazards.
Applicable Standards
- GB763-90 "Heating of AC high-voltage apparatus under long-time operation"
- GB1207-1997 "Voltage transformers"
- GB1208-1997 "Current transformers"
- GB17201-1997 "Combined transformers"
- GB4208-93 "Degrees of protection provided by enclosures"
- GBJ63-90 "Design code for electric metering devices of power installations"
- DL/T448-2000 "Management code for electric energy metering devices"
- DL/T566-95 "Technical requirements for voltage-loss recorders"
- JB5777.2-91 "General technical requirements for control and relay protection panels (cabinets, desks) for secondary circuits of power systems"
- GB/T11022 "Common technical requirements for high-voltage switchgear and controlgear standards"
- JB5777.3-91 "Basic test methods for control and relay protection panels (cabinets, desks) for secondary circuits of power systems"
- DL/T593-96 "Common specifications for ordering high-voltage switchgear"
- GB/1984 "AC high-voltage circuit breakers"
- GB/T11022 "Common technical requirements for high-voltage switchgear and controlgear standards"
- GB311.1 "Insulation coordination of high-voltage transmission and transformation equipment"
- GB/T16927.1 "High-voltage test techniques, Part 1: General test requirements"
- GB3309 "Mechanical tests of high-voltage switchgear at normal temperature"
- GB311.1-1997 "Insulation coordination of high-voltage transmission and transformation equipment"
- SD109 "Verification regulation of electric energy metering devices"
Outline Structure of the Floor-standing Intelligent Prepaid HV Metering Box (Boundary-switch Integrated Prepaid Metering Device)
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