Flameproof Dry-Type Mining Substation Transformer

Product Detail

Product Introduction

The KBSGZY series flameproof dry-type mining transformers adopt a fully corrugated cylindrical flameproof enclosure and select high-quality materials to enhance operational reliability. They require no maintenance during normal operation. These transformers are suitable not only for underground mines, tunnels and other environments with methane mixtures and coal dust where explosion hazards exist, but also for environments with gases and vapors that are not corrosive enough to metals or destructive to insulation.

Operating Principle

The variable frequency transformer section is designed to obtain two sets of three-phase power supplies with a phase difference of 30 degrees through low-voltage dual-splitting. An electrostatic screen is placed between the high and low-voltage sections, and the insulation level of the low-voltage coils is raised to a voltage rating of 10KV to meet the higher common-mode voltage generated by the secondary-side variable frequency rectifier.

An isolation switch and circuit breaker are installed inside the high-voltage switch to disconnect the control power supply and load current. The main power source is monitored and fault isolation is performed using a comprehensive protection system with PLC. The auxiliary transformer is protected against overcurrent using fuses.

The low-voltage switch employs a dual-circuit design and utilizes two PLC comprehensive protection systems to monitor and check each other, completing equipment operation monitoring and fault isolation.

Both high and low-voltage switches communicate with the downstream variable frequency inverters, enabling phase-locking and interlocking functions to prevent equipment damage due to operational errors.

Feature

High-efficiency Heat Dissipation：Patented full-corrugated cylindrical structure prevents water and dust accumulation on the top, ensuring excellent heat dissipation performance.
Effective Explosion Protection：The shell can withstand a pressure of 1MPa, providing superior flameproof performance.
Low Loss and Low Noise：Partial discharge quantity is less than 5pC, which improves product reliability with low noise operation.

Main parameters

Model	Rated Capacity (kVA)	primary voltage	Secondary voltage	The connection group designation number	Loss of empty load	Load loss	Short-circuit impedance	No-load current	L	B	H	Theoretical weight kg
KBSGZY2-T-50/6	50	6000±5%	693/400 1200/693	Yy0(d11)	350	550	4	2.5	3620	840	990	2275
KBSGZY2-T-80/6	80	6000±5%	693/400 1200/693	Yy0(d11)	450	780	4	2.5	3620	840	990	2440
KBSGZY2-T-100/6	100	6000±5%	693/400 1200/693	Yy0(d11)	520	920	4	2.5	3620	840	990	2480
KBSGZY2-T-125/6	125	6000±5%	693/400 1200/693	Yy0(d11)	600	1080	4	2.5	3620	840	990	2665
KBSGZY2-T-160/6	160	6000±5%	693/400 1200/693	Yy0(d11)	700	1300	4	2	3995	1175	1385	2765
KBSGZY2-T-200/6	200	6000±5%	693/400 1200/693	Yy0(d11)	820	1500	4	2	3995	1175	1385	2905
KBSGZY2-T-250/6	250	6000±5%	693/400 1200/693	Yy0(d11)	950	1800	4	2	4055	1175	1385	3070
KBSGZY2-T-315/6	315	6000±5%	693/400 1200/693	Yy0(d11)	1100	2150	4	1.8	4055	1175	1385	3365
KBSGZY2-T-400/6	400	6000±5%	693/400 1200/693	Yy0(d11)	1300	2600	4	1.8	4100	1175	1425	3640
KBSGZY2-T-500/6	500	6000±5%	693/400 1200/693	Yy0(d11)	1500	3100	4	1.5	4115	1175	1425	3715
KBSGZY2-T-630/6	630	6000±5%	693/400 1200/693	Yy0(d11)	1800	3680	4	1.5	4175	1175	1425	4230
KBSGZY2-T-800/6	800	6000±5%	1200/693 3450	yy0(d11) Yyn0	2050	4500	4	1	4265	1175	1425	4505
KBSGZY2-T-1000/6	1000	6000±5%	1200/693 3450	yy0(d11) Yyn0	2350	5400	4	1	4265	1175	1450	5170
KBSGZY2-T-1250/6	1250	6000±5%	1200/693 3450	yy0(d11) Yyn0	2750	6500	4	1	4390	1350	1600	5705
KBSGZY2-T-1600/6	1600	6000±5%	1200/693 3450	yy0(d11) Yyn0	3350	8000	4	0.8	4610	1190	1805	8480
KBSGZY2-T-2000/6	2000	6000±5%	1200	yy0(d11) Yyn0	3800	9500	4.5	0.6	4780	1220	1870	9750
KBSGZY2-T-2500/6	2500	6000±5%	3450	yy0(d11) Yyn0	4500	10600	5	0.6	4780	1220	1985	10725
KBSGZY2-T-3150/6	3150	6000±5%	3450	Dyn11	5300	12500	5.5	0.6	5740	1310	2055	12980
KBSGZY2-T-4000/6	4000	6000±5%	3450	Dyn11	6100	14000	6	0.6	5740	1310	2055	15120
KBSGZY2-T-50/10	50	10000±5%	693/400 1200/693	Yy0(d11)	390	680	4	2.5	3930	1030	1265	2725
KBSGZY2-T-80/10	80	10000±5%	693/400 1200/693	Yy0(d11)	490	880	4	2.5	3930	1030	1265	2785
KBSGZY2-T-100/10	100	10000±5%	693/400 1200/693	Yy0(d11)	560	1050	4	2.5	3930	1030	1265	2910
KBSGZY2-T-125/10	125	10000±5%	693/400 1200/693	Yy0(d11)	650	1300	4	2.5	3930	1030	1265	3000
KBSGZY2-T-160/10	160	10000±5%	693/400 1200/693	Yy0(d11)	800	1500	4	2	3980	1030	1265	3290
KBSGZY2-T-200/10	200	10000±5%	693/400 1200/693	Yy0(d11)	950	1800	4	2	4175	1030	1520	3400
KBSGZY2-T-250/10	250	10000±5%	693/400 1200/693	Yy0(d11)	1100	2100	4	2	4175	1030	1520	3530
KBSGZY2-T-315/10	315	10000±5%	693/400 1200/693	Yy0(d11)	1300	2500	4	1.8	4175	1030	1520	3500
KBSGZY2-T-400/10	400	10000±5%	693/400 1200/693	Yy0(d11)	1500	3000	4	1.8	4220	1090	1555	3985
KBSGZY2-T-500/10	500	10000±5%	693/400 1200/693	Yy0(d11)	1750	3500	4	1.5	4220	1260	1555	4445
KBSGZY2-T-630/10	630	10000±5%	693/400 1200/693	Yy0(d11)	2000	4100	4	1.5	4280	1260	1555	4685
KBSGZY2-T-800/10	800	10000±5%	1200/693 3450	yy0(d11) Yyn0	2300	5100	4	1.2	4345	1260	1555	4905
KBSGZY2-T-1000/10	1000	10000±5%	1200/693 3450	yy0(d11) Yyn0	2600	6100	4.5	1.2	4375	1330	1585	5505
KBSGZY2-T-1250/10	1250	10000±5%	1200/693 3450	yy0(d11) Yyn0	3100	7400	4.5	1	4420	1370	1610	5895
KBSGZY2-T-1600/10	1600	10000±5%	1200/693 3450	yy0(d11) Yyn0	3800	8500	5	1	4890	1270	1805	8600
KBSGZY2-T-2000/10	2000	10000±5%	1200	Yy0 Yyn0	4500	9700	5	0.7	4960	1270	1825	10720
KBSGZY2-T-2500/10	2500	10000±5%	3450	Yy0 Yyn0	5200	10800	5.5	0.7	4965	1270	2025	11490
KBSGZY2-T-3150/10	3150	10000±5%	3450	Dyn11	6100	12800	5.5	0.7	5065	1320	2095	13400
KBSGZY2-T-4000/10	4000	10000±5%	3450	Dyn11	7000	15000	6	0.7	5800	1320	2095	17500
KBSGZY2-T-5000/10	5000	10000±5%	3450	Dyn11	8200	17600	6.5	0.6	5980	1490	2150	20550
KBSGZY2-T-6300/10	6300	10000±5%	3450	Dyn11	9500	20000	7	0.6	5980	1490	2150	26000

Model	Rated Capacity (kVA)	primary voltage	Secondary voltage	The link group designation	Loss of empty load	Load loss	Short-circuit impedance	No-load current	L	B	H
KBSGZY-ZT-1600/6/2x1.903	1600	6000±5%	2x1.903	Qd0y11	3800	9500	7.5	0.6	5370	1180	1085
KBSG2Y-ZT-1600/10/2x1.903	1600	10000±5%	2x1.903	Qd0y11	4500	9700	7.5	0.7	5690	1260	1085
KBSGZY-ZT-2000/6/2x1.903	2000	6000±5%	2x1.903	Qd0y11	4500	10600	8	0.6	5410	1210	1085
KBSGZY-ZT-2000/10/2x1903	2000	10000±5%	2x1.903	Qd0y11	5200	10800	8	0.7	5760	1260	1085
KBSGZY-ZT-2500/6/2x1.903	2500	6000±5%	2x1.903	Qd0y11	5300	12500	8	0.6	5645	1260	2025
KBSGZY-ZT-2500/10/2x1.903	2500	10000±5%	2x1.903	Qd0y11	6100	12800	8	0.7	5845	1260	2025

Brand	ROCKWILL
Model NO.	Flameproof Dry-Type Mining Substation Transformer
Rated voltage	100kV
Rated frequency	50/60Hz
Series	KBSGZY