1 the project environmentAltitude: 1.1 ≤ 1000m.
1.2 environmental temperature
The highest temperature: 40'C.
The lowest temperature: -5 ℃ (indoor)
The maximum daily temperature: 25K.
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 coefficient of not less than 1.67.
15 installation methods:
-- indoor vertical screen installation elevation gradient is not more than 50
-- storage, transport limit temperature: GB / T 15145-94 34 provisions
Surrounding environment: -- with GB / T 15145-94 3.5 provisions
2, standard
2.1 standards
DL / T 5136-2001 thermal power plant, substation two wiring design specification
GB 11920-89 electrical part of power plant centralized specification control device 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
Substation voltage rating: 500 / 220 / 66kV
System frequency: 50Hz
PT rated voltage: 57 7V / 100V
CT rated current: La
3 protection cabinet (or screen) technical characteristics
3.1 cabinet (or screen) includes all the installation of equipment or a single component in the above have sufficient mechanical strength and correct installation. Meet the DL / T720 power system relay protection cabinet, screen general technical specification requirements. Our company on protection cabinet (or screen) is responsible for the overall correctness of internal wiring, in the specified environment conditions, characteristics and functions of the supply of equipment shall be fully meet the requirements of technical specification.
3.2 protection cabinet (or screen) mechanical structure can defense;
Dust
Wet
Salt contamination
Insect and animal
Under the high temperature and low temperature
Vibration protection cabinet bracket
3.3 for ease of operation and repair, the use of standard components and assemblies:
3.4 protection before the cabinet, after the door, a shielding material glass windows on the front door. Can drop signal and the signal lamp monitor internal. The door in the opening and closing, without misoperation. Protection cabinet before, back door shall be embedded, protection cabinet including the thickness of the gate, a total thickness of 600mm, the front door to door, single door, on the left (right) hand side (based on the human face protection cabinet positive prevail): the back door for a double door, front, back door lock: height including the nameplate height cabinet (60mm), 2260mm. The width of the cabinet 800mm. The top of the cabinet 2200mm located above the single busbar frame (with 16 small bus), screen and screen eyebrow detachable.
3.5 protection cabinet and the equipment can be used in earthquake area,
3.6 protection cabinet with a 100mm section of copper grounding busbar, grounding bus 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 connected by at least two screws. In addition, the grounding bus every 10cm has a 5mm diameter hole:
3.7 protective devices in the cabinet arrangement and terminal layout to ensure the independence of each protection, in a set of protection maintenance without affecting the normal operation of any other set of protection system.
3.8 protection cabinet internal wiring using heat-resistant, resistant to moisture and flame retardant has enough intensity of insulated copper wire.
3.9 wire without damage, end wire should be connections with pressing type; our company provide wire slot, with wiring for fixing cable and terminal blocks.
3.10 terminal to ensure that there is enough (insulation level voltage rating not less than 800V):,
3.11 terminal row of the segmented, terminal row should be at least 20% standby terminal and can add when necessary.
3.12 lead to the terminals on the rationality of the cable, the same cable from the terminal arranged on the same side of the terminal is near, may introduce more than two core cable loop must be large enough to avoid the connection terminal, a terminal voltage of two wire.
3.13 terminals tripping on the outlet and a DC power supply is not connected to the adjacent terminals, positive, negative DC power supply is not connected to the adjacent terminals.
3.14 CT, PT circuit uses AC test terminals can be broken, the signal circuit breaking terminals; communication circuit wire section of not less than 2.5mm2
DC characteristics of 3.15 each device should be fast switching action instructions and enough breaking capacity. Small DC switch DC characteristics of the import of miniature circuit breaker.
3.16 screen inside and outside must be clean, should be cleared of all debris and smear and everything inside.
3.17 we ensure the anticorrosion performance of surface protection cabinet and painted in the transport, storage and normal operation.
Device 3.18 per side cabinet and the (include relays, control switch, switch control circuit and other independent equipment) have the label box, in order to clearly identify: shell of mobile equipment, equipment in the body also has the same identification markers.
3.19 for those who must be replaced parts and plug in accordance with the provisions of the manufacturing plant, has a special symbol.
Between 3.20 in the cabinet, protection device and the screen terminal device and connection with clear identification.
3.21 cabinet outer dimensions of 2260 x 800 x 600mm (2360).
Cabinet: the user specified color
