Zjh-12 Series Outdoor Hv AC Floor Type Metering Box Circuit Breaker

Product Description

GENERAL
 

ZJH-12 series outdoor high-voltage AC floor type metering box (hereinafter referred to as "Floor type Metering box") is applicable to three-phase AC 50Hz and rated voltage 12kV three-phase power system. It can be used for power metering of high-voltage cable incoming users. It can be installed in parks, residential areas, and roadside lawns in industrial and mining areas. It can directly open the door to check the meter low and conduct on-site breaker opening and closing operations.

The floor-type metering box is mainly composed of a vacuum circuit breaker, casting type combined transformer, lightning arrester, live display, and intelligent control device. Its metering methods include a three-phase three-wire system and a three-phase four-wire system. It can be configured with a zero sequences current transformer for grounding protection.

The floor type metering box meets the requirements of GB / T 1984-2014 high voltage AC circuit breaker, DL / T 402-2016 high voltage AC circuit breaker, and DL / T 403-2000 technical conditions for ordering 12kV ~ 40.5kV high voltage vacuum circuit breaker, GB / t17201-2007 and DL / T 721-2013 remote terminal of the distribution automation system.

MODEL DESCRIPTION



USAGE: ENVIRONMENTAL CONDITION

1. Altitude: ≤ 1000m, If the altitude is higher than 1000m, the rated insulation level shall be corrected accordingly.
2. Ambient temperature: -40^oC ~ +45^oC, 
3. Maximum daily temperature difference: 25K 
4. Humidity: Average daily relative humidity: 95%, average monthly relative humidity: 90%. 
5. Sunshine intensity: not more than 0.1W/cm² 
6. Wind Speed:  34m/s 
7. Wind pressure: 700Pa
8. Pollution level: e - level
9. Icing thickness: Not more than 10mm 
10. Resistance to floor drain: horizontal acceleration 0.3g, vertical acceleration 0.2g

MAIN ADVANTAGES

☆ small floor area, low investment, and high-cost performance;
☆ it has the functions of automatic power transmission, data processing, display, storage, alarm, and automatic power off;
☆Equipped with anti stealing device, it can reduce unnecessary power loss for the power system;
☆It has the function of prepayment to prevent the user from defaulting on electricity charges;
☆The box is of stainless steel floor type structure, with a beautiful appearance and convenient installation.

MAIN TECHNICAL PARAMETERS
 
Main Technical Parameters of Vacuum Circuit Breaker Body
 

No.	Item		Unit	Data
1	Rated frequency		Hz	50
2	Rated voltage		kV	12
3	Rated current		A	630 / 1250
4	Rated short-time power frequency withstand voltage	Interphase, to earth(wet)	kV/min	34/1
		Interphase, to earth(dry)		42/1
		Fracture (dry)		48/1
		Secondary circuit to earth		2/1
5	Rated lightning impulse withstand voltage	Interphase, to earth	kV	75
		Fracture		85
6	Rated short-time withstand current and duration		kA/s	20/4   25/4
7	Rated Short-circuit breaking current(Effective value)		kA	20 / 25
8	Rated short-circuit Making Current (peak)			50 / 63
9	Rated Peak-withstand current			50 / 63
10	Rated Short-circuit breaking current breaking times		Times	30
11	Rated operating voltage and Rated Voltage for auxiliary(control) circuit		V	AC/DC220 DC48, DC24
12	Mechanical life		Times	10000
Note: If the altitude is over 1000m, the rated insulation level should be modified as appropriate.

Main Technical Parameters High-Voltage Metering Part
 

Serial No.	Item		Unit	Technical Parameters
1	Rated Frequency		Hz	50
2	Power Factor			0.8 (Lagging)
3	Rated Primary Voltage	Three-Phase, Three-Wire System	kV	10
		Three-Phase, Four-Wire System		10/√3
4	Rated Secondary Voltage	Three-Phase, Three-Wire System		0.1/0.22
		Three-Phase, Four-Wire System		(0.1/√3) / 0.22
5	Voltage Transformer Wiring Mode	Three-Phase, Three-Wire System		V-V
		Three-Phase, Four-Wire System		Y-Y
6	Rated Primary Current		A	5 ~ 600
7	Rated Secondary Current			5
8	Voltage Transformer Accuracy Level			0.2/3
9	Current Transformer Accuracy Level			0.2S
10	Voltage Transformer Rated Output		VA	15/200
11	Voltage Transformer Limited Output			500 (Level 3)
12	Current Transformer Rated Output			10
13	Polarity			Minus Polarity
14	Rated Short-Time Power Frequency Withstand Voltage		kV/min	42/1
15	Rated Lightning-Impulse Withstand Voltage		kV	75

OUTLINE AND INSTALLATION DIMENSION