PLG 630 Power Distribution Unit

N is the characteristic code of the enterprise, M is the code of the plastic shell circuit breaker, 1 is the design serial number, 630 is the rated current of 630A, L is the standard type, M is the higher type, H is the high breaking type, the first 3 of 3300 represents the number of poles is 3 poles, the back 3 is the tripper mode and accessories, and 2 is the circuit breaker for protecting the motor.

Circuit breaker refers to a switchgear that can close, carry and break the current under normal circuit conditions, and can close, carry and break the current under abnormal circuit conditions within a specified time. Circuit breakers are divided into high-voltage circuit breakers and low-voltage circuit breakers according to their scope of use, and the division of high and low voltage boundaries is relatively blurred, and generally more than 3kV is called high-voltage electrical appliances.

The circuit breaker can be used to distribute electric energy, start the asynchronous motor infrequently, protect the power supply line and the motor, and automatically cut off the circuit when they have serious overload or short circuit and undervoltage and other faults, and its function is equivalent to the combination of fuse switch and over/underheat relay. In addition, it is generally not necessary to change the parts after the fault current is switched off. At present, it has been widely used.

In the generation, transmission and use of electricity, power distribution is an extremely important link. The power distribution system includes transformers and various high and low voltage electrical equipment, and the low voltage circuit breaker is a kind of electrical appliances that are widely used.

630 is the shell current, nm1 is the manufacturer's production number, m is the segmentation capacity, the previous 3 is the number of stages, and the last 300 is the code of the accessory.

Sulfur hexafluoride gas-insulated ring main unit, voltage 12kV, bus current 630A

RMM2 plastic shell circuit breaker rated insulation voltage 690V, mainly used in AC 50Hz, rated working voltage 400V, rated current 630A and below in the distribution network, as a distribution of electric energy and protection of lines and power equipment from overload, undervoltage, short circuit and other faults. The circuit breaker can also protect the motor from overload, undervoltage and short circuit.

After the RMM2 plastic shell circuit breaker is equipped with a grounding fault protection type overcurrent tripper, in addition to the original overload and short-circuit protection functions, the grounding fault protection function is newly added. It can provide protection against fire or other hazards caused by ground faults that cannot be detected by general overcurrent protection devices.

After the RMM2 plastic shell circuit breaker is equipped with a communication module, the information on the circuit breaker can be uploaded to the control computer through the fieldbus, and the closing and disclosing of the circuit breaker can be controlled by the computer.

UseDouble break contact, faster breaking speed, higher breaking capacity Intelligent overcurrent tripper, high tripping accuracy, can have three-stage protection.

It does not need auxiliary power supply, and has strong anti-interference performance.

The adjustable range of setting current is large and the accuracy is high, simplifying selection and installation.

The ambient air temperature is not higher than +40 C and not lower than -5 C, and the average value of 24 hours does not exceed +35 C;

In special cases, the circuit breaker can work in extreme environments with ambient air temperature of -40 C and 70 C, the user should declare to the manufacturer, and pay attention to the decapitation coefficient at high temperatures. The altitude of the installation site is generally not more than 2000m.

The relative humidity of the atmosphere at the installation site does not exceed 40% at the ambient air temperature of +50 C; There can be higher relative humidity at lower temperatures; The average monthly maximum relative humidity of the wettest month is 90%, while the average monthly minimum temperature for that month is +25 C, taking into account condensation on the product surface due to temperature changes.

The pollution level is level 3.

The circuit breaker should be installed in accordance with the requirements specified in the instruction manual provided by the manufacturer.

Note: The circuit breaker is generally the upper inlet line, the lower outlet, if the user requires the rmm lower inlet line, it should be put forward as a special order.

Circuit breakers and accessories connected to the main circuit are used for overvoltage category III; Accessories where the circuit breaker is not connected to the main circuit are used in overvoltage category II.

It has an isolation function.

It has the effect of current limiting and effectively protects the load.

Equipped with a pre-alarm indication.

Hello: XLC- Busway.

XL-Intensive C--Copper denotes the second generation.

630A current rating.

Now the transformer compensation cabinet on the pole is generally placed next to the transformer, and the transformer is also possible.

Generally, most of the high-voltage compensation is placed on the high-voltage transmission line for fixed compensation, but the low-voltage compensation is best carried out according to the power factor of the load, so as not to increase the investment.

Low voltage compensation is used for easy management and maintenance. As for the amount of compensation, two conditions should generally be considered, 1 how many kilowatts of load is inductive load, 2 what value to be compensated, we will not be fined if we exceed it. If your load is an inductive load such as a motor, 220 thousand can be exceeded, the capacitor should be placed in the distribution box with heat dissipation holes, and the AC contactor is controlled by a three-phase capacitor automatic compensator, and the contactor controls the capacitance.

It is recommended to use low voltage compensation, which is easy to repair, less expensive and safer.

The 630 transformer compensation should be about 400kvar

It adopts low voltage compensation, good economy, automatic adjustment, and easy maintenance. Whether the compensation is sufficient depends on the load situation.

The standard pier is probably smaller. Compensating for 180kvar requires a volume that is not too large. You can customize it on the manufacturer.

For general loads, if the calculation is not accurate, the compensation capacitor is often selected according to 30% of the transformer capacity; For the transformer of 630kva, the amount of capacitor that should be compensated is: 630*30%=; If the capacity of a single capacitor is, then 12 pieces are enough, and the total compensation capacity can be reached, which can meet the needs.

If the natural power factor of the load is relatively low, the compensation capacitor can be selected according to 40% of the transformer capacity; For 630kva transformer, the amount of capacitor that should be compensated is: 630*40%=; If the capacity of a single capacitor is, then 16 pieces are enough, and the total compensation capacity is reached, which can meet the compensation requirements;

In the past, the capacity of a single capacitor was relatively small, and the number of blocks required was relatively large, when the number exceeded 10, a cabinet may not be able to fit, and the number of cabinets needs to be increased; At the same time, the number of output channels of the automatic controller also limits the number of single capacitors; Therefore, a single capacitor with a larger capacitance can be selected.

Check CM1 product sample:

CM1--- Changshu switch manufacturing **** molded case circuit breaker model 630 shell frame current level.

m--- higher breaking type (rated ultimate breaking capacity 65ka) 3 tripoles.

200 instantaneous electromagnetic trips.