33KV 50~2500KVA OIL-IMMERSED DISTRIBUTION TRANSFORMER

TECHNICAL SPECIFICATIONS:
Voltage Range: 33KV
Capacity: 50 to 2500KVA
Tap Range: ±2x2.5%
Frequency: 50Hz or 60Hz
Phases: Three-Phase
Vector Group: Dyn11, Yyn0 or others
Cooling: ONAN
Insulation Class: A class
Temperature rise: 60/65K
Insulation material: Mineral oil, FR3 Oil or Silicone oil
Winding material: Copper or Aluminum
Standards: IEC60076 or Local standard

Availability:

Quantity:



Inquire

Product Description

1. General Description

Application: Power distribution networks, industrial & mining power systems
Key Advantages:

Compact & aesthetic design
Low noise (<65 dB)
High overload capacity

Types Available:

Hermetically Sealed (maintenance-free)
Conservator Type (with oil expansion tank)

Suitable Environments:

Industrial plants, oil & chemical sites (resistant to contamination)

2. Technical Specifications

Voltage Regulation

Off-Load Tap Changer (Standard):

±2×2.5% adjustment (manual knob operation)
Safety Feature: Locking holes prevent incorrect tap positioning

Optional On-Load Tap Changer (OLTC):

Vacuum/oil-contact types for live voltage regulation
Compatible with any market-standard OLTC (including small-power units)

Insulation & Cooling

Standard Fluid: Mineral oil (PCB-free, vacuum-dried, IEC/GB compliant)
Alternatives:

Silicon oil (high-temperature stability)
FR3 vegetable oil (eco-friendly option)

3. Standard & Optional Accessories

Standard Inclusions

✔ HV/LV Porcelain Bushings (3-phase + neutral)
✔ Oil Conservator (for non-sealed units)
✔ Oil Level Indicator
✔ Drain Valve & Filler Cap
✔ Lifting Lugs & Floor Rollers
✔ Nameplate & Earthing Terminals

Optional Upgrades

Protection Systems:

Buchholz relay (gas/oil-operated)
Pressure relief valve
DGPT2/RIS protection (for sealed units)

Enhanced Safety:

IP55-rated bushing covers
Electrostatic screen (HV-LV isolation)

Monitoring:

Thermometer with alarms
Dehydrating breather (humidity control)

TECHNICAL DATASHEET FOR 33KV OIL FILLED TRANSFORMER

Model	H.V(kV)	L.V(KV)	Uk(%)	P0 [W]	Pk[W]
S-50/33	33	0.4	4	168	875
S-63/33	33	0.4	4	224	1260
S-100/33	33	0.4	4	272	1505
S-160/33	33	0.4	4	384	2170
S-200/33	33	0.4	4	456	2520
S-300/33	33	0.4	4	576	3815
S-400/33	33	0.4	4	638	4638
S-500/33	33	0.4	4	700	5460
S-630/33	33	0.4	4	825	6430
S-800/33	33	0.4	4	1015	7700
S-1000/33	33	0.4	4	1222	9450
S-1250/33	33	0.4	4	1500	11700
S-1500/33	33	0.4	4	1785	13860
S-1600/33	33	0.4	4	1950	14900
S-2000/33	33	0.4	4	2736	15750
S-2500/33	33	0.4	4	3400	16300