Product Description
This one is the TZZB-12 Switchgear,a high voltage reactive power compensation device built specifically for 12kV power distribution systems. Unlike your typical switchgear that just handles circuit switching and protection, this one has a more specialized job. It automatically compensates reactive power in 12kV electrical networks, which helps improve power factor, cut down on line losses, and keep voltage stability in check.
Technical Parameters
|
Item |
Unit |
Data |
|
Rated Voltage |
kV |
12 |
|
Rated Frequency |
Hz |
50/60 |
|
Rated Insulation Level |
Kv |
|
|
Lightning Impulse Withstand Voltage(peak) |
kv |
75(Phase-to-phase and phase-to-earth) |
|
1min Power Frequency Withstand Voltage(RMS) |
kv |
42(Phase-to-phase and phase-to-earth) |
|
Power Frequency Withstand Voltage of Auxiliary Control Circuit |
v |
2000 |
|
Rated Current |
A |
630,1250,1600,2000,2500,3150 |
|
Rated Short-circuit Breaking Current |
kA |
20,25,31.5,40 |
|
Rated Short-circuit Making Current(peak) |
kA |
50,63,80,100 |
|
Rated Short-time Withstand Current(4s) |
kA |
20,25,31.5,40 |
|
Rated Peak Withstand Current |
kA |
50,63,80,100 |
|
Rated Voltage of Auxiliary Control Circuit |
v |
DC or AC 110/220 |
|
Protection Level |
IP4X |
|
|
Overall Dimensions(Width*Depth*Height) |
mm |
650*1500*2100(typical) |
|
Weight |
kg |
600-1200(depending on configuration) |
Advantages
It runs on an intelligent automatic control system,so things happen pretty smoothly.
The high voltage vacuum contactor handles switching reliably.
Response time is fast,really fast,and overall system losses are kept low.
Applications
Industrial manufacturing is a big one.Factories with large motors,compressors,and pumps see real benefits from automatic power factor correction.
Mining operations too.Conveyors,crushers,and grinding mills create a lot of reactive power demand,and this equipment handles that kind of load really well.
Steel and metalworking is another good fit.Rolling mills and induction heating equipment can cause rapid load fluctuations,but the fast response controller manages those swings without much trouble.
Frequently Asked Questions
Q1: What does TZZB-12 stand for?
A: It is basically a model designation for high voltage automatic reactive power compensation equipment.The 12 part tells you the rated voltage class,so it is meant for 12kV systems.Some manufacturers also offer a 40.5kV version if you need it for higher voltage applications.
Q2: What are the standard ratings?
A: Typical ratings you will see include a rated voltage of 12kV,compensation capacity ranging from 300 kvar up to 6000 kvar,and step configurations anywhere from 1 to 10 stages depending on the specific model.The capacitor banks are arranged in steps so they can match varying load conditions as they change.
Q3: How does the automatic controller work?
A: The controller is pretty straightforward.It continuously measures system voltage and current through CTs and PTs,then calculates the actual power factor and compares it to whatever target you have set.If the power factor falls below that target,it closes contactors to bring more capacitor banks online.If it rises above the target,it opens contactors to take some banks offline.It just keeps things in balance automatically.
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