Engineering Excellence • IEC & BSTI Certified

Products & Industrial Equipment

Complete manufacturing, assembly, and testing of Substation Equipment, Transformers, HT/LT Switchgear, PFI Banks, and Diesel Generators.

1. Transformers 2. Switchgear (HT & LT) 3. PFI & Control Panels 4. Diesel Gensets & AVR

Substation Core

3.1 Power & Distribution Transformers

Dedicated Solution Hub 11kV Distribution & 33kV Heavy Power

Interactive 11kV & 33kV Transformers Portal & Technical Specs

Explore full CAD dimensions, live capacity filtering (50 kVA up to 18,000 kVA), core losses, unity PF efficiency ratings, and direct RFP quote generation.

Explore Transformers Hub

Voltcore designs and manufactures 3-Phase Distribution and Power Transformers ranging in rating from 50 KVA to 5000 KVA (and up to 18,000 KVA for 33/11kV power transformers). Manufactured strictly with Cold Rolled Grain Oriented (CRGO) silicon steel to deliver minimal losses, high operating efficiency, and long lifespan. Final routine and type tests are performed in our testing laboratory according to IEC-76, BDS-1081, ANSI, BS, VDE, and BSTI standards.

Transformer Design Parameters

Standards: IEC 76, BDS-1081, ANSI, VDE, BS, AEC, BSTI
Frequency: 50Hz, 60Hz (on request)
Ratings: 50 to 5000 KVA (Distribution) | Up to 18000 KVA (33/11kV)
Primary Voltage: 11kV or 33kV (Values up to 36 kV)
Tapping: 2.5%; ±5% or ±2×2.5% to 7.5%
Secondary Voltage: 415V to 440V (Double LV bushings available)

Table 1: Electrical Specifications for 11000/415 Volt, 3-Phase Transformer

Sl. No	Rated Capacity (KVA)	No Load Loss (W)	Load Loss at 75°C (W)	Efficiency at Unity PF (%)	Approx. Oil Weight (Kg)	Total Weight (Kg)	Length (cm)	Width (cm)	Height (cm)	Impedance Voltage (%)
01	50	150	925	98.00	140	580	94	58	118	4.0
02	100	245	1700	98.42	180	650	100	63	132	4.0
03	150	320	2412	98.60	220	900	105	88	145	4.0
04	200	435	2820	98.79	230	975	93	112	150	4.0
05	250	520	3265	98.81	270	1100	95	113	158	4.0
06	315	580	4500	98.89	350	1250	120	97	160	4.0
07	400	722	5490	98.95	390	1450	123	98	162	4.0
08	500	865	6275	99.00	425	1725	124	102	165	4.0
09	630	920	7740	99.05	500	1970	136	103	170	4.5
10	750	1150	8850	99.06	625	2250	155	112	185	5.0
11	800	1300	9800	99.06	650	2575	170	113	200	5.0
12	1000	1650	11600	99.08	800	2850	185	115	215	5.0
13	1250	1820	12300	99.10	1000	3725	190	116	225	5.0
14	1600	2200	14275	99.12	1200	4300	200	120	230	6.0
15	2000	2650	16470	99.15	1450	4750	135	210	250	6.0
16	2500	3140	19700	99.17	1800	5600	150	220	285	6.5
17	3000	3420	22860	99.19	2050	6350	170	230	300	6.5

Table 2: Electrical Specifications for 33000/11000 Volt, 3-Phase Transformer (1000 KVA – 18000 KVA)

Sl. No	Rated Capacity (KVA)	No Load Loss (W)	Load Loss at 75°C (W)	Efficiency at Unity PF (%)	Approx. Oil (Kg)	Total Weight (Kg)	L (cm)	W (cm)	H (cm)	Impedance Voltage (%)
01	1000	1750	12500	98.95	850	4000	1950	1650	2200	6–7
02	1250	2050	14900	98.97	1000	4800	2000	1700	2250	6–7
03	1500	2380	16900	98.98	1170	5400	2050	1750	2280	6–7
04	1600	2470	17800	98.98	1260	5700	2090	1800	2300	6–7
05	2000	2950	21000	99.00	1450	6600	2150	1880	2370	6–7
06	2200	3150	22500	99.01	1600	7300	2200	1950	2420	6–7
07	2500	3500	24700	99.02	1750	8050	2300	2050	2500	6–7
08	2800	3800	26800	99.02	1900	8600	2350	2100	2560	6–7
09	3000	4000	27900	99.03	2000	9200	2420	2200	2620	6–7
10	3500	4500	30700	99.03	2250	10250	2500	2290	2680	6–7
11	3800	4750	32200	99.02	2450	10900	2580	2350	2730	6–7
12	4000	5000	33500	99.03	2500	11000	2640	2440	2770	6–7
13	4400	5300	35000	99.04	2650	11850	2700	2500	2850	6–7
14	4800	5650	37000	99.04	2850	12500	2760	2600	2900	6–7
15	5000	5850	37500	99.05	2950	12800	2850	2680	2970	6–7
16	5500	6250	39700	99.03	3170	13600	2930	2750	3000	6–8
17	6000	6700	41800	99.04	3400	14400	3000	2850	3100	6–8
18	6500	7100	43700	99.04	3600	15200	3050	2910	3150	6–8
19	7000	7500	45600	99.05	3800	15900	3120	3000	3200	6–8
20	8000	8300	50000	99.05	4220	17500	3200	3080	3270	6–8
21	8500	8700	51200	99.05	4400	18000	3270	3170	3320	6–8
22	9000	9200	52800	99.06	4600	18700	3350	3250	3400	6–8
23	9500	9400	55000	99.08	4800	19400	3400	3300	3450	6–8
24	10000	9800	56000	99.08	4900	19900	3480	3400	3500	6–8
25	11000	10600	60000	99.11	5300	21200	3500	3450	3550	7–10
26	12000	11300	64000	99.12	5600	22500	3550	3470	3590	7–10
27	13000	12200	68000	99.14	6000	23800	3600	3510	3620	7–10
28	14000	12800	71700	99.15	6300	25000	3630	3550	3660	7–10
29	15000	13600	75400	99.18	6600	26200	3670	3600	3700	7–10
30	16000	14300	79300	99.19	7000	27400	3700	3630	3740	7–10
31	17000	15000	82900	99.19	7300	28500	3750	3670	3800	7–10
32	18000	15700	86500	99.20	7600	29600	3800	3720	3820	7–10

Grid Protection & Control

3.2 Switchgear Solutions (HT & LT)

1. Fixed Type Switchgear

Suitable for VCB / LBS / SF6 breakers fixed securely to a switchgear frame or floor by base bolting. Optional wheels provide convenient movement. Direct connections to incoming/outgoing busbars ensure maximum stability.

Main Connection: High-grade bolted busbars
Control Connection: Screw termination
Earth Connection: Low resistance grounding

2. Draw-Out Type Switchgear

The VCB or SF6 breaker is mounted on a rugged cradle with automatic shutters and interlocks. Easily inserted or withdrawn without any mechanical realignment needed.

Safety Interlock: Breaker cannot be withdrawn in closed position
Global Sourcing: Relays, CTs & PTs imported from USA, Germany, France, UK & Japan

High Tension (HT) Switchgear (12kV & 33kV)

Rated voltages of 12kV and 33kV, current range 400A to 1250A. Fully compartmentalized cubicles with busbar chamber, PT compartment, CT/cable termination compartment, breaker compartment, and metering chamber.

Advantages of Vacuum Circuit Breaker (VCB):

Proven hermetically sealed vacuum interrupters
Maintenance-free vacuum interrupter with low contact erosion
Fast recovery of dielectric strength
Suitable for auto re-closing duty with minimal moving parts

Low Tension (LT) Switchgear

Manufactured in sheet steel (12–16 SWG) cladded modular systems conforming to DIN 41488. Dust and vermin proof, IP40 degree of protection, floor-mounting indoor type with TPN & E copper busbars.

Rated Voltage: Up to 660V, 50 Hz
Rated Current: Up to 7200A (Breakers up to 6300A)
Peak Withstand Current: Main busbars up to 176 kA
Standard Components: ABB, Merlin Gerin (Schneider), and SIEMENS

View Full Switchgear Specifications & Technical Data →

Power Quality Management

3.3 Power Factor Improvement (PFI) & Control Panels

Inductive loads (motors, transformers) demand reactive power, causing heavy line losses, voltage drops, and severe utility penalties. Our automatically switched capacitor banks—the VOLTCORE PFI Plant—relieve distribution systems of reactive power, drastically reducing electricity costs and stabilizing substation voltage.

1) Modular Design

Adaptable to evolving industrial plant loads.

2) Compact Arrangement

Saves valuable substation floor space.

3) Low Losses Capacitors

Heavy-duty dry type capacitors.

4) High Reliability

Tested micro-controller switching relays.

5) Factory Wired

100% pre-tested before site delivery.

6) Fully Extendible

Effortless capacity addition anytime.

All Types of Custom Electrical Control Panel Boxes

We design and manufacture heavy-duty distribution and automation panels for industrial facilities:

Main Distribution Boards (MDB) Sub-Distribution Boards (SDB) Motor Control Centers (MCC) PLC Industrial Automation Panels Star-Delta & DOL Starters

View Dedicated PFI & Control Panels Page →

Continuous & Standby Power

3.4 Diesel Generators & Automatic Voltage Stabilizers (AVR)

Explore Dedicated Page →

VOLTCORE supplies heavy-duty Diesel Generators ranging from 13 KVA up to 2200 KVA, driven by globally recognized engine brands including Perkins (UK), Cummins (USA), and Ricardo. Paired with Automatic Voltage Regulators (AVR) to deliver rock-solid voltage stabilization during fluctuating grid levels.

Table 3: Diesel Generator Technical Specifications (13 KVA – 500 KVA Chart)

Genset Rating	Prime KVA	Prime Power (kW)	Standby KVA	Standby (kW)	Engine Model	Dimension L×W×H (cm)	Weight (kgs)	Fuel Cons. @75% (L/H)
13 KVA	13	10.4	14.3	11.44	403D-15G	115 × 56 × 117	470	2.8
20 KVA	20	16.0	22.0	17.00	404D-22G	132 × 56 × 122	560	4.0
25 KVA	25	20.0	27.5	22.00	1103A-33G	147 × 70 × 136	800	5.4
30 KVA	30	24.0	33.0	26.00	1103A-33G	158 × 70 × 136	800	5.4
42.5 KVA	42.5	34.0	45.0	36.00	1103A-33TG1	158 × 70 × 135	960	8.2
45 KVA	45	36.0	49.5	39.50	1103A-33TG1	158 × 70 × 135	960	8.2
60 KVA	60	48.0	63.0	50.40	1103A-33TG2	163 × 70 × 144	960	10.4
65 KVA	65	52.0	71.5	57.20	1104A-44TG1	180 × 70 × 148	960	11.2
80 KVA	80	64.0	88.0	70.40	1104A-44TG2	186 × 72 × 149	1080	14.0
100 KVA	100	80.0	110.0	88.00	1104C-44TAG2	186 × 72 × 149	1130	17.1
150 KVA	150	120.0	165.0	132.00	1106A-70TAG2	231 × 77 × 158	1350	31.0
200 KVA	200	160.0	220.0	176.00	1106A-70TAG4	254 × 86 × 187	1830	35.0
250 KVA	250	200.0	275.0	220.00	1506A-E88TAG3	254 × 86 × 187	1920	36.0
300 KVA	300	240.0	330.0	264.00	1506A-E88TAG5	318 × 113 × 215	3580	54.0
350 KVA	350	280.0	380.0	304.00	2206A-E13TAG2	318 × 113 × 215	3580	54.0
400 KVA	400	320.0	440.0	352.00	2206A-E13TAG3	318 × 116 × 215	3700	62.0
450 KVA	450	360.0	495.0	396.00	2506A-E15TAG1	340 × 113 × 222	3900	72.0
500 KVA	500	400.0	550.0	440.00	2506A-E15TAG2	340 × 113 × 222	3900	76.0

Automatic Voltage Stabilizer / Regulator (AVR)

An Automatic Voltage Regulator (AVR) stabilizes fluctuating voltage levels into constant, safe power. AVRs stabilize output voltage at variable industrial loads, balance reactive load sharing between parallel gensets (voltage droop), and defend electrical systems against severe overloads.