Outdoor Three-Phase Dry-Type Combined Instrument Transformer

The global pursuit of smarter, safer, and more resilient power grids is reshaping the entire industry. For utilities and industrial operators in the US, Southeast Asia, and Germany, selecting the right metering and protection equipment is crucial. Outdoor three-phase dry-type combined instrument transformers stand out as an excellent choice, integrating metering and protection functions into a rugged, maintenance-free device.

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Product Description

Ceho is a manufacturer and supplier specializing in supplying Outdoor Three-Phase Dry-Type Combined Instrument Transformer. Combined Interchange Inductors (CITs) integrate current transformers (CTs) and voltage transformers (VTs) into a single device. The "three-phase" design can simultaneously handle three-phase voltage in high-voltage systems. Crucially, the "dry-type" and "outdoor" specifications mean:

Dry-type: Uses epoxy resin or other solid insulating materials instead of oil. This eliminates the risk of leakage, fire, or environmental contamination.

Outdoor application: Designed to withstand harsh environmental conditions such as rain, dust, UV radiation, and extreme temperatures.

The combined design of this transformer provides a compact, safe, and highly reliable solution for accurate energy metering, billing, and protective relays in outdoor substations.

Outine dimension

This type of voltage and current combined instrument transformer is suitable for power systems with a rated frequency of 50Hz or 60Hz and a rated voltage of 10kV and below, for voltage, current and energy measurement and relay protection.

Rated voltage ratio(V)	Accuracy class and rated secondary output(VA)	Limit output(VA)	Rated insulation level(KV)
6000/100	0.2-2×20 0.5-2×50 1-2×80 3-2×200	2×400	7.2/32/60
10000/100	0.2-2×20 0.5-2×50 1-2×80 3-2×200	2×400	12/42/60

Rated primary current(A)	Single transformation ratio	Accuracy class and rated secondary output(VA)			1s thermal current(KA)	Rated dynamic currnet(KA)
Rated primary current(A)	Single transformation ratio	(0.2)s	0.5s	0.5	1s thermal current(KA)	Rated dynamic currnet(KA)
7.5-10-15	7.5	10	10	15	1.0	2.5
10-15-20	10				1.5	3.75
15-20-30	15				2.4	6.0
20-30-40	20,25				3.0	7.5
30-40-50	30				4.5	11
40-50-75	40				8	20
50-75-100	50				9	22.5
75-100-150	75				12	30
100-150-200	100				16	40

Rated primary current(A)	Single transformation ratio	Accuracy class and rated secondary output(VA)			1s thermal current(KA)	Rated dynamic currnet(KA)
		(0.2)s	0.5s	0.5
150-200-300	150	10	10	15	24	60
200-300-400	200,250				32	80
300-400-500	300				45
400-500-600	400				60	100

Why Choose Us?

1. Enhanced Safety and Environmental Compliance:

Oil-Free, Risk-Free: The dry-type design eliminates the fire hazards associated with oil-immersed transformers, a crucial safety feature for all regions.

Environmentally Friendly: With no oil leaks, there is no threat to soil or groundwater, complying with stringent US and German environmental regulations.

2. Superior Durability and Low Maintenance Costs:

Weather Resistance: Utilizing high-quality materials and coatings, it resists corrosion, moisture, and contamination. This is crucial for coastal areas in Southeast Asia and industrial regions in Germany.

Maintenance-Free: Unlike oil-immersed transformers that require regular sampling and maintenance, dry-type transformers require virtually no maintenance, significantly reducing lifecycle costs.

3. High Accuracy and Reliability:

Provides accurate measurement data for billing and grid management, ensuring revenue security for power companies.

Performs exceptionally well under a wide range of temperature and load conditions, ensuring stable grid operation.

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Contact Info

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Address

No. 381, Jingqi Road, Economic Development Zone, Yueqing City, Zhejiang Province, China
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Tel

+86-19905879911
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Email

kevin@ningboziyao.com

For inquiries about power transformer, box-type substation, switchgear or price list, please leave your email to us and we will be in touch within 24 hours.