The electrical commissioning of the power distribution and distribution system includes the primary circuit of the circuit breaker, the isolating switch, the current transformer, the reactor, and the secondary circuit of the relay protection and measuring instrument. This commissioning project only considers general relay protection devices (such as current protection for protection against overload and current protection for protection against short circuits), and does not include special protection and test adjustments for automatic device inputs.
1 Transmission and distribution equipment system commissioning is applicable to busbar connection, busbar section, circuit breaker circuit. If busbar protection is provided, the busbar section breaker circuit, in addition to the commissioning of a system's power transmission and distribution device, must be executed again. A busbar commissioning.
2 Transmission and distribution equipment system commissioning does not include special protection and automatic device adjustment. The so-called special protection device refers to power direction protection, distance protection, high frequency protection and line cross-link differential protection; the so-called automatic device refers to the automatic input of the standby power supply, automatic reclosing device. If these protection devices and automatic devices are used, they should be listed separately, and the number should be the same as the number of "systems" of the power distribution and distribution devices.
The commissioning of 3380v and 3~6kv motor feed circuit equipment (such as switchgear or switchboard) is included in the motor inspection wiring and commissioning list items.
4 Transformer (including factory transformer) incoming line equipment to the voltage distribution equipment of each level should not be used as the power distribution equipment system. The debugging work is included in the commissioning list of the transformer system.
The power supply line of the high-voltage power distribution device of the 5th factory shall be quoted from the busbar of the 6kv main distribution device (when the transformer is not used), and the system debugging list of the power distribution device shall be listed separately.
2. Commissioning process of electrical adjustment test(1) The whole process of electrical engineering debugging includes three stages: the body test of the equipment, the sub-system debugging, and the overall debugging of the whole equipment. The scope of the debugging in this chapter only includes the body test and sub-system debugging of the equipment, and does not include the overall commissioning. It should be calculated separately according to the professional quota.
(2) The commissioning project does not include equipment drying, cable fault finding, motor shaft inspection, and replacement, repair, and modification due to defects in equipment components. The impact on the cost of electrical commissioning work due to poor quality of equipment components and unreasonable design has not been considered. In case of the above, additional commissioning fees may be charged.
(3) The scope of commissioning of the comprehensive base price is limited to the commissioning of the electrical equipment itself, and does not include the trial operation of the motor driven mechanical equipment. This work belongs to the category of “testing†and should be calculated separately.
(4) All debugging sub-projects include familiar data, check equipment, fill in test records and collation, and prepare commissioning reports.
(5) Commissioning of the motor, excluding steam for testing, power above 10KV and other power sources, media consumption.
(6) The 1KV sub-heading in the commissioning of the power distribution unit is applicable to all low-voltage power supply circuits with debugging components.
(7) The power supply circuit from the distribution box to the motor is included in the system commissioning sub-assembly of the motor and must not be repeated.
(8) Cable test in the feeder system, pressure resistance of porcelain bottles, insulation measurement of wires and equipment, etc., are included in the relevant projects.
(9) The circuit breaker and busbar section break in the power supply bridge circuit are used as the independent power transmission and distribution equipment system calculation commissioning fee. (10) The integrated base price is considered by a circuit breaker on one side of the system. If there are circuit breakers on both sides, it is calculated by two systems.
3. The proportion of electrical commissioningThe adjustment work of a loop or system includes: body test, auxiliary high voltage and secondary equipment test, breaker and instrument test, primary current and secondary circuit check start test. If you need to calculate the commissioning cost of one of the (phases) separately when preparing the budget, it can be calculated as a percentage.
4. Calculation method for the number of commissioning of electrical power distribution systemHow to calculate the number of electric power transmission and distribution system commissioning, so calculate, take the low-voltage system as an example, if there is a power distribution cabinet, there are 3 circuits, of which 1# circuit is molded case circuit breaker, 2# is AC contactor, 3 #是刀开关, it should be calculated according to 2 systems, this has a principle, most of the electric operation or non-electrical operation must be counted as one system, plus the power distribution cabinet body, is 2, if 3 #水泵 with a pump behind, and this pump has a float device, then add a system. The number of low-voltage power distribution cabinets plus the number of electric operations or non-electrical operation in the cabinet is the number of low-voltage systems.
5. Engineering quantity calculation rulesThe power consumption required for electrical commissioning in Article 2.11.2 is included in the quota and is generally not calculated. However, the steam, electric power and other power energy consumption for starting and debugging of motors and generators above 10 kW and the power consumption of transformer no-load test run shall be calculated separately.
Article 2.11.3 Circuit breakers and busbar section circuit breakers of the power supply bridge circuit are calculated and commissioned according to the independent power transmission and distribution equipment system.
Article 2.11.4 The commissioning of the power transmission and distribution equipment system is considered by one circuit breaker on one side. If there are circuit breakers on both sides, it shall be calculated according to two systems.
Article 2.11.5 Commissioning of power transmission and distribution equipment system is applicable to system commissioning of various power supply circuits (including lighting power supply circuits). Where the power supply circuit has debugging components such as instruments, relays, electromagnetic switches, etc. (excluding the knife switch and fuse), it is calculated according to the debugging system. Mobile electrical appliances and household electrical appliances connected to the sockets, etc., which have been commissioned by the manufacturer and do not require user self-adjustment, should not be counted for commissioning.
Section 2.11.6 Commissioning of the transformer system shall be based on a circuit breaker on each voltage side. The corresponding quota of more than one circuit breaker according to the corresponding voltage level of the power distribution equipment system commissioning shall be calculated separately.
Section 2.11.7 Dry-type transformer commissioning, the corresponding capacity transformer commissioning quota is multiplied by a factor of 0.8.
Article 2.11.8 Special protection devices are all set up to form a protection circuit. The calculation of engineering quantity is as follows (special protection devices are not included in the commissioning quota of each system and should be calculated separately):
1. Generator rotor grounding protection, according to the whole plant generator sharing consideration.
2. Distance protection, calculated according to the number of transmission line circuit breakers protected by design regulations.
3. High frequency protection, calculated according to the number of transmission line circuit breakers protected by design regulations.
4. The debugging of the fault recorder is calculated by a set of screens.
5. Failure protection is calculated according to the number of circuit breakers that set the protection.
6. Loss of field protection, calculated according to the number of motors protected.
7. The disconnection protection of the converter is calculated according to the number of converters.
8. The small current grounding protection is calculated according to the number of power circuit breakers equipped with the protection.
9. Protection checks and printer commissioning are calculated as a complete set of circuits that make up the system.
Article 2.11.9 The automatic device and signal system debugging include the adjustment of the components such as relays and meters and the secondary circuit. The specific provisions are as follows:
1. The standby power supply is automatically put into the device, and the number of the standby power supply self-injection device system is determined according to the number of interlocking mechanisms. A spare plant transformer is used as the backup power source for the three-stage factory working bus. When calculating the standby power supply automatic input device, it should be three systems. Two mutually alternate lines or two transformers with automatic input devices are installed. When calculating the standby power supply automatic input device, it should be two systems. The standby motor automatic input device is also calculated accordingly.
2. The line automatic reclosing is debugged, and the number of systems is calculated according to the number of automatic circuit breakers using automatic reclosing devices. The comprehensive reclosing commissioning is also calculated according to this regulation.
3. The commissioning of the automatic frequency modulation device takes one generator as a system.
4. Synchronous device commissioning, designed to constitute a set of devices that can complete the simultaneous parallel behavior is a system calculation.
5. Battery and DC monitoring system debugging, a group of batteries are calculated according to one system.
6. The accident lighting switching device is debugged, and a set of devices capable of completing AC/DC switching according to the design is calculated by a debugging system.
7. Zhoubo load-reduction device debugging, where there is a weekly rate relay, no matter how many circuits are connected, it is calculated according to a debugging system.
8. The transmitter screen is calculated by the number of screens.
9. The central signal device is commissioned, and the engineering quantity is calculated for each debugging system according to each substation or power distribution room.
10. The uninterruptible power supply unit commissioning is calculated by the “set†as the unit of measurement.
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