Gang electric - XGN66A - 12 ring network cabinet

Product overview
XGN66A - 12 ring network cabinet is suitable for 36, 12 kv three-phase ac 50 hz, as acceptance and distribution of electricity device in the system and equipped with oil switch places suitable for frequent operation of switchgear transformation.The busbar system for single busbar system and single busbar section.Switchgear conforms to GB3906 "3-35 kv ac metal-enclosed switchgear" DL404 "indoor ac high voltage switch cabinet order technical conditions" requirement, switchgear beautiful shape, small volume, complete with reliable prevent wrong operation function.Within the switchgear equipped with the main switch for ZN73-12 type or ZN28-12 type vacuum circuit breaker, disconnecting switch adopts GN30-12, GNl9-10 type isolating switch, grounding switch adopts JN5-1 type 2 earthing switch.

Model and meaning

The environmental conditions of the normal use
1, the ambient temperature: the highest + 40 ℃ ~, minimum 15 ℃ ~;
2, altitude: not more than 1 000 m;
3, relative humidity, daily average no more than 96%, on average less than 90%;
4, seismic intensity is not more than eight level;
5, no fire and explosion danger, serious foul, chemical corrosion and the site of violent vibration.

The main technical parameters

Structural characteristics of

1, switchgear and shown in figure 1;
2, switch box fixed structure, the cabinet put oneself in another's position by covering the zinc steel plate after multiple assembled after bending, switch cabinet after the upper main busbar chamber, chamber at the top of the pressure relief devices;Before the upper for low pressure chamber, the small bus can use cable connection from the bottom of the chamber, or decorate in the room at the top of the copper tube or copper bar;Well versed in the switch cabinet part, busbar chamber through GN30 type rotary keep the electrical connection in the k in the isolating switch and part of installation of vacuum circuit breaker, the lower the grounding switch and outlet side isolating switch;At the back of the installation of current transformer, voltage transformer, lightning arrester, after a cable from the tank bottom outlet end of SAN arrangement grounding bus bar, throughout the row of switchgear;Isolating switch and earth switch right in front of the ark.

3, interlocking

3.1 disconnector and earthing switch interlocking can guarantee when isolating switch in the closing position, grounding switch not closing;When drilling to switch in the closing position, isolating switch can not close her stomach, as shown in figure 2, both in the break-brake position at this time, order 2 bar disconnector and earthing switch, at the same time operating shaft sleeve on the gap alignment, due to limited by 2 pole length, will any axis basin with the operating axis to closing position or points between the closing position, another operation shaft is cannot be operation.
3.2 with dial pin on isolating switch operation hole three sequence (see figure 1) is used to fixing the isolating switch break-brake position, pull out the pin when isolating switch can be operated.When the circuit breaker in the closing position, mount on the shaft of the gusset plate (2) button to pull pin cannot be pulled out, so as to ensure the circuit breaker closing after isolating switch can not be operating;Brake circuit breaker points after the gusset plate rotating Angle, annul are just pull out.Ensure the isolating switch circuit breaker break-brake before operation.
3.3 if the isolating switch is not in place, operation circuit breaker should not closing.As shown in figure horse, on the isolation switch operating shaft is equipped with CAM, and isolating switch in the department of the closing position, the CAM down three plunger, lift the circuit breaker in a body, to block the switch core jin of xia moved circuit breaker closing tripping device, a circuit breaker is not closing.
3.4 grounding switch points after the brake operation, grounding switch shaft buckle piece toward the door cannot be opened, grounding switch after closing, can open the door, at this point grounding switch located 7 l operation under the action of a baffle playing Dong Li rise, 7 l blocking operation, make it can't be operate, close the door when the damper is on the door a clamp pressure, hole above operation, ensure that operators into the cable chamber, a loop in the safety ground state.
,] opened in 3.5 later, still can guarantee for the protection grade lP2X operator cannot enter charged across the room.

Operating procedures
1, power operation
Close door grounding switch operation break-brake a pull pull pin (figure
2, power operation
Circuit breaker break-brake pull pin pull one isolating switch points brake operation, pull pin automatically in the summer of a circuit breaker closing.
Pull pin automatic reset operation grounding switch closing an open the door.

The installation
Based refer to figure 5, 1, installation foundation channel steel jutting 1-3 ram, per meter range should not be the irregularities of silkworm forced ram, 1 5 full length range is less than 5 mm.
2, place the switchgear in order to basis, adjust the location of the installation.Then use 1 M 2 bolts or fixed in spot welding methods, cabinet and cabinet asked with the M8 bolts and tight.
3, piecemeal HouGaiBan mistress line installation and a cable, terminal interface should pay attention to clean and the neutral soil forest.After installed attention seal good cable hole at a time.
4, connection and grounding bus bar, along the direction of the switchgear arrangement even adult, check for omissions, grounding and protection work continuous conduction, whether the ground loop grounding electric work is not more than 1000ƲQ, protective earthing resistance shall be not greater than 4ῼ。
5, and installation of secondary cable, cable introduced by the bottom of the tank before, along the wall into the low pressure chamber, tap on the terminal row, or by the ark secondary small bus, the low pressure chamber is introduced in installed block electricity;
6, clear ash contained in the clutter.

Put into operation
1, should be done before put into operation the following inspection and debugging.
1. According to order to check whether the installation of electrical components contained in the model and specification, check whether the fastener is loose, check and secondary wiring is correct, isolating switch, grounding switch, breaker operation, mechanical interlocking 3 ~ 5 times, no card lag phenomenon, should be flexible interlock meet the requirements of "five prevention", and then inject grease for mechanical parts.

1.2 according to article 3 of this manual and the factory test report check switchgear insulation level and loop resistance, mechanical properties of circuit breaker, the results should be consistent with the factory test report or similar.

2, according to article 5 of this manual stop transmission operation, the isolating switch operation schedule for 90DHS,Grounding switch for 180DHS,Operation direction is clockwise or counterclockwise.

Maintenance and repair
1, users should regularly to maintenance and overhaul of switchgear, empty inside are:
Each part of the 1.1 cleaning dust, especially on the surface of the insulation of dust;
1.2 check the mechanical parts, filling lubricating oil regularly, keep the action is flexible and reliable;
1.3 circuit breaker, isolating switch, grounding switch component maintenance according to their respective specifications;
1.4 check whether the electric contact parts is good, have without overheating, whether the ground loop conduction;
1.5 check whether the fasteners is fastened on a regular basis.
2, user and should be performed in the factory with the assistance of troubleshooting, if a little adjustment and glitches, user's manual.