KS9 Type 6-10kV Series Mining Oil-immerse Power Transformer

The KS9 series mining transformer is engineered for coal mine underground central substations, shaft bottom yards, and main air intake roadways where gas is present but explosion risk is absent. It is also suitable for relatively humid tunnel environments. Normal operating conditions allow for altitudes up to 1000m and temperatures ranging from -25°C to +40°C. For special conditions exceeding 1000m altitude, the temperature range extends from -45°C to +40°C. The unit withstands up to 95% relative humidity and environments free from severe vibration, with a maximum installation inclination of 35°.

product details

Type & Meaning

K: Mining Type (General Type)
S: Three-Phase
9: Performance Level Code
Box 1: Rated Capacity (kVA)
Box 2: Voltage Class (kV)

Product Features

● The tank has a robust structure and can withstand a pressure test of one atmosphere. There is no oil conservator on the tank cover. High and low voltage cable junction boxes are welded on both sides of the tank wall for cable connection. The high-voltage winding has rated voltage and ±5% tap voltage, which is adjusted via a tap changer. Voltage adjustment must be performed after cutting off the power supply and removing the weather cover of the tap changer on the tank wall.
● The low-voltage side of the transformer can be connected in "Y" configuration for 690V power supply, or reconnected in "△" configuration for 400V power supply. Six porcelain bushings are led out from the secondary terminals in the cable junction box for user modification.
● The entire transformer is lifted using lifting lugs welded on the tank wall. A trolley bracket is installed at the bottom of the transformer tank, with mounting holes for installing mine car rollers as required by the mine.

product Display

KS9 Type Oil-immerse Power Transformer view

KS9 Type Oil-immerse Power Transformer left

Technical Parameters

Technical Parameters of KS9 Type 6-10kV Series Mining Oil-immerse Power Transformer

Rated Capacity (kVA)	Voltage Combination			Connection Symbol	No-Load Loss (W)	Load Loss (W)	Short-Circuit Impedance (%)	No-Load Current (%)	Weight (kg)		Overall Dimensions (mm)	Wheelbase (mm)
Rated Capacity (kVA)	High Voltage (KV)	Tap Changer (%)	Low Voltage (kV)	Connection Symbol	No-Load Loss (W)	Load Loss (W)	Short-Circuit Impedance (%)	No-Load Current (%)	Oil Weight	Total Weight	Length (L)×Width (W)×Height(H)	Wheelbase (mm)
50	6 6.3 10	±5 Or ±2×2.5	0.4 0.69	Yyn0 Or Yd11	170	870	4.0	2.0	90	400	1150×750×980	400×200
80					250	1250		1.8	120	550	1240×770×1010	550×220
100					290	1500		1.6	130	580	1250×780×1050	550×240
125					340	1800		1.5	140	650	1280×790×1080	550×240
160					400	2200		1.4	160	790	1350×820×1120	660×260
200					480	2600		1.3	190	900	1450×840×1130	660×260
250					560	3050		1.2	220	1040	1480×920×1200	660×300
315					670	3650		1.1	250	1200	1500×950×1250	660×300
400					800	4300		1.0	310	1410	1650×950×1400	660×320
500					960	5150		1.0	350	1620	1750×980×1500	660×340
630					1200	6200	4.5	0.9	400	1850	1800×1100×1550	710×360
800					1400	7500	4.5	0.9	600	2200	1900×1200×1700	820×380

Note: 1. Transformers with a low voltage of 1.2kV can be provided according to user requirements.
2. The weight and overall dimension data in the table are for reference only; no prior notice will be given for any changes.