新疆安吉儿动力设备有限公司

Frequently asked questions about diesel generator sets
What are the conditions for using two generator sets in parallel? What device is used to complete the parallel work?
Answer: The condition for parallel use is that the instantaneous voltage, frequency and phase of the two machines are the same. Commonly known as three simultaneous. Use a special parallel device to complete the parallel work. It is generally recommended to use fully automatic parallel cabinets. Try not to use manual paralleling. Because the success or failure of manual paralleling depends on human experience. Based on many years of experience in electric power work, the author boldly states that the reliable success rate of manual paralleling of diesel generators is equal to 1. The concept that a large mains power supply system can be manually paralleled must not be applied to a small power supply system, because the protection levels of the two are completely different.
What is the power factor of a three-phase generator? Can a power compensator be added to improve the power factor?
Answer: The power factor is. No, because the charging and discharging of the capacitor will cause small power fluctuations. and unit vibration.
Why do we require customers to tighten all electrical contacts after every hour of operation of the unit?
Answer: The diesel generator set is a vibration worker. Moreover, many domestically produced or assembled units that should use double nuts are useless. It is useless to use spring washers. Once the electrical fasteners are loose, a large contact resistance will be generated, causing the unit to operate abnormally.
Why must the generator room be clean and the floor free of floating sand?
Answer: If the diesel engine inhales dirty air, the power will decrease. If the generator inhales sand and other impurities, the insulation between the stator and rotor gaps will be destroyed, and in severe cases, it will burn out.
Why does our company generally not recommend users to use neutral point grounding during installation?
Answer:) The self-regulation function of the new generation generator has been greatly enhanced
) In practice, it has been found that the lightning failure rate of neutral point grounded units is relatively high.
) The grounding quality requirements are relatively high and cannot be achieved by ordinary users. Unsafe work grounding is worse than no grounding.
) Units with a grounded neutral point will cover up leakage faults and grounding errors of the load, and these faults and errors cannot be exposed under high-current power supply conditions.
. What issues should be paid attention to when using a unit with an ungrounded neutral point?
Answer: The line may be live because the capacitive voltage between the live line and the neutral point cannot be eliminated. Operators must have line of sight to live objects. It cannot be handled according to the mains electricity custom.
. How to match the power of diesel generator to ensure stable output?
Answer:) It is generally expressed in terms of apparent power. First, multiply it and convert it into a unit consistent with the active power of the generator.
) If a general generator is used, multiply the active power of the generator to determine the power of the generator, that is, the generator power is twice the power.
) If a generator with (permanent magnet excitation) is used, the generator power is determined by multiplying the power by , that is, the generator power is times the power.
Can electronic or electrical components marked with voltage resistance be used in diesel generator control cabinets?
Answer: No. Because the voltage marked on the diesel generator set is the effective voltage. Its peak voltage is . times of the effective voltage. That is, the peak voltage of the diesel generator is.
. Do all diesel generator sets have self-protection functions?
Answer: No. Currently on the market, even among the units of the same brand, some have them and some don't. Users must figure it out themselves when purchasing the unit. It is best to put it in writing as an attachment to the contract. Generally, low-priced machines do not have self-protection functions.
How to identify fake and inferior domestic diesel engines?
Answer: First check whether there is a factory certificate and product certificate. They are the identification certificate of the diesel engine leaving the factory and are required. Then check the three major numbers on the certificate) nameplate number) body number (in reality, it is usually on the machined plane at the flywheel end with convex fonts)) oil pump nameplate number. Check these three numbers with the actual numbers on the diesel engine and they must be accurate. If you find any doubts, you can report these three numbers to the manufacturer for verification.