High Voltage Electric Components - High Voltage Automatic Recloser


MZZⅡ-12/T630-20 Outdoor AC High Voltage Automatic Recloser

Introduction: AC High Voltage Automatic Recloser [Vacuum Circuit Breaker]
MZZ(Ⅱ)-12/T630-20 Outdoor AC High Voltage Automatic Recloser (hereinafter refers to “recloser”) is a 50Hz three-phase AC outdoorHigh Voltage Electric Componentsequipment. It is chiefly used as the protection switch for urban and rural substation 10kV side switch and 10kV circuit. It can automatically monitor the operations of the transmission wire and tell accurately transient failure and permanent failure as well as fix more than 95% instantaneous failure. This recloser has self-protection and self-control functions that it can automatically operate in the AC circuit according to preset opening and closing order and reset or lock the system after the operations. The system can realize automatic power distribution and does not need extra control. It can minimize the blackout scope and shorten blackout time. Standard RS232, 485 communication interface and complete four remote control functions are the powerful supporters for the full implementation of electrical power system.

Functional features - AC High Voltage Automatic Recloser
1. Computer control device is configured with a group of 20 batteries which can support 50-hour work after the power cut.
2. The battery can be charged by electronic PT, AC220V or CT charge. Both are safe and reliable.
3. The device has the function of remote control of opening and closing switch. The remote control distance can be 30m.  Thus, the operation workers do not need to climb the electric pole.
Model Meaning

Technical parameters - AC High Voltage Automatic Recloser Table One
Order Name Unit Parameter
1 Rated voltage kV 12
2 Rated current A 630/1250
3 Rated frequency Hz 50
4 Working frequency voltage tolerance１min Dry test kV 42/49
Wet test 75/85
5 Gap between ground/ fracture of lightening impact current tolerance (peak value) kV 20
6 Rated short circuit breaking current KA 50
7 Rated short circuit closing current (peak value) KA 50
8 Rated peak value current tolerance KA 20
9
4s short time current tolerance		 KA Open- 0.3S open/close- 180S -open/close
10 Rated operation cycle 30
11 Rated times of short circuit breaking current Times 50000
12 Mechanical life span Times 2
13 Secondary circuit １min work frequency voltage tolerance KV ()/5
14 Protective CT/measurement A A 15
VA VA 180
15 Weight Kg 0-50(adjustable)
16 Reclose interval Second 1-4(adjustable)
17 Setting times of reclosing switch Times 20-4000(adjustable)
18 Start setting overflowed current A 0-50(adjustable)
19 Delay setting overflowed current Second 20-4000(adjustable)
20 Rapid breaking start current setting A DC24V AC220V
21 Rated energy storage voltage V DC24V AC220V
22 Rated voltage of opening/closing switch release V DC24V AC220V
23 Simulation measurement error ≦29%

Table Two
Order Name Unit Parameter
1 Opening size of the contact Mm 11±1
2 Contact excess trip Mm 3+1.0 3-0.3
3 Average Switch closing speed M/s 0.65±0.15
4 Average Switch opening speed M/s 1.1±0.2
5 Time difference of same period three-phase opening switches Ms ≦2
6 Bouncing time of closing switch Ms ≦2
7 Switch closing time Ms ≦60
8 Switch opening time Ms ≦70
9 Direct current resistance of each circuit μΩ ≦200
10 Allowed accumulated attrition thickness of dynamic, static contact Mm 3
Contour and installation dimension - AC High Voltage Automatic Recloser
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