1, is suitable for the environmentAltitude: 1.1 ≤ 1000m.
1.2 environmental temperature
The highest temperature: 40'C.
The lowest temperature: -5 ℃ (indoor)
The maximum daily temperature: 251K.
1.3 maximum relative humidity:
The daily average: 95%,
Monthly average: 90%,
1.4 seismic capacity
The horizontal acceleration: 0.3g: vertical acceleration: 0.15g:
The safety factor is not boy weighing 1.67,
1.5 installation methods
-- indoor vertical screen installation elevation gradient is not more than 50
A storage, transportation ambient temperature: in accordance with the GB / T15145-943.4 rule
A surrounding environment: in accordance with GB / T151 45-94 3.5 provisions
2, general requirements
2.1 standards
DL / T 5136-2001 thermal power plant, substation two wiring design specification
GB 11920-89 electrical part of power plant centralized control device for general technical specification book
DL / Z 713-2000 500kV substation immunity requirement for protection and control equipment
DL / T 5137-2001 electrical measurement and electric energy measurement device design rules
Rated voltage grade substation
System frequency: 50Hz
The rated voltage of PT: 57.7V / l00V
CT rated current: lA
The technical characteristics of 2.2 watt hour meter
The quantity of equipment:
Meter: can choose full electronic intelligent watt hour meter, each kilowatt hour meter with active double direction, feeling the turtle capacitive wattless pulse output, with the RS485 serial port (2)
Communication function, protocol using DL / T645-1997 protocol: completion of the factory and the distance meter Nie system alignment function.
Device power consumption: less dry 4VA, battery: power provides standby power clock working for the green environmental protection type lithium battery, shall be reliably connected to the circuit board, lithium battery using 1 / 2AA type, capacity of about 1Ah (10%), battery production date and required delivery date is not more than 1 years.
3, electric meter cabinet technical characteristics
3.1 watt hour meter cabinet (or screen) includes all the installation of equipment or a single component in the above have sufficient mechanical strength and correct installation. To meet the requirements of DL / T720 power system relay protection cabinet, screen general technical specification, ensure the electric meter cabinet (or screen) in hoisting, transportation, storage and will not damage the installation process.
3.2 watt hour meter cabinet (or screen) mechanical structure can defense:
Dust
Wet
Salt contamination
Insect and animal
Under the high temperature and low temperature
Vibration meter cabinet bracket
3.3 cabinet front, after the door, glass door. Watt hour meter cabinet before, back door are embedded, electric meter cabinet comprises a door thickness, thickness of 600mm., the front door for single door, the door on the left (right) hand side (facing the front of the cabinet to prevail): the back door for a double door, front, back door lock. Height including nameplate height cabinet (60mm), 2260mm. The width of the cabinet of 800mm 2200mm, the top of the cabinet. The single busbar frame (with 16 small bus). Screen after screen can remove eyebrow.
3.4 watt hour meter cabinet and the equipment can be used in earthquake area.
Steel grounding bus 3.5 meter cabinet with a l00mm section, earthing busbar and the screen body insulation. Grounding bus terminal is equipped with reliable pressure connected terminal, in order to receive power station grounding net,
All the cabinet of the grounding and grounding busbar connection with two screws. In addition, the grounding bus every 10cm has a 5mm diameter hole.
Arrange and terminal equipment 3.6 meter cabinet layout to ensure the independence of each set of equipment, in a set of device maintenance without affecting the normal operation of any device.
3.7 watt hour meter cabinet internal wiring is heat-resistant, resistant to moisture and flame retardant has sufficient strength of the insulated wire.
3.8 wire without damage, the end of the wire connecting piece pressing type. Provide wire slot, with wiring for fixing cable and terminal blocks.
The 3.9 terminal support to ensure that there is sufficient (insulation level voltage rating not less than).
3.10 terminal row of the segmented, terminal row of at least 20% standby terminal and can add when necessary
The 3.11 lead to the terminal blocks to consider the rationality of the cable terminals, in the same cable in the arrangement of the terminal is close on the same side, into more than two core cable loop must be large enough to avoid the connection terminal, a terminal voltage of two wire.
3.12 terminal row of alternating current, voltage and DC power supply shall not be connected to adjacent terminals, positive, negative DC power supply is not in the adjacent terminals
3.13CT, PT loop using a test terminal communication can be broken. The signal loop adopts AC circuit breaking terminal, wire section is not small dry 2 5mm2:
3.14 DC characteristics of fast switch should be action indication and enough breaking capacity. Selection of DC characteristics and small switch
The 3.15 screen of the internal and external cleaning, remove the interior of all debris and inside and outside all stains.
3.16 ensure the anticorrosion performance of surface electric meter cabinet and painted in the transport, storage and normal operation.
Device 3.17 per side cabinet and has a label box, can be clearly identified, the shell of mobile equipment, should have the same identification mark in the equipment body.
3.18 for those who must be replaced parts and plug in accordance with the provisions of the manufacturing plant, has a special symbol.
Between the device and the device 3.19 meter cabinet device and screen terminals, connections between clearly marked.
3.20 watt hour meter cabinet outer dimensions of 2260 x 800 x 600mm (2360).
