PVA Series Combined instrument transformer
Key attributes
| Brand | Rockwell |
| Model NO. | PVA Series Combined instrument transformer |
| Rated voltage | 123/145kV |
| Series | PVA Series |
Product descriptions from the supplier
Overview
The PVA 123a and PVA 145a combined instrument transformer is top core construction; it comprises current and voltage modules encapsulated in common hermetically sealed housing filled with PCB free transformer oil. The current module is located in transformer’s head and voltage module is in the bottom tank. The transformer’s stainless steel expansion bellows is fixed to the head and it is made of stainless steel. The expansion bellows compensates for thermal changes in oil volume.
The location of both CT and VT modules in one housing benefits the environment and offers reductions in the total cost of ownership of a substation due to:
Reduced Station footprint:
- lower number of transformers in a bay,
- lower number of supporting structures,
- lower number of connections.
- lower cost of civil works.
- lower transportation costs.
- lower installation costs.
Technology parameters
Online store
On-time delivery rate
Response time
100.0%
≤4h
Company overview
Workplace: 60000m²
Total staff:
Highest Annual Export(usD): 100000000
Services
Business Type: Design/Manufacture/Sales
Main Categories: High Voltage Electrical Apparatus
Whole life care manager
Whole-life care management services for equipment procurement, use, maintenance, and after-sales, ensuring safe operation of electrical equipment, continuous control, and worry-free electricity consumption.
The equipment supplier has passed platform qualification certification and technical evaluation,
ensuring compliance, professionalism, and reliability from the source.
Related Products
-
TG Combi Series Gas-insulated combined current and voltage transformer
-
JLSZXW5-12 outdoor combined metering transformer
-
JLSZXW-36 outdoor pole mounted combined metering transformer
-
JLDZXW1-72.5 outdoor combined transformer
-
JLSZXW1-36 outdoor three phase combined transformer
-
JLDZXW1-36 36kV Outdoor Three-Phase Combined Transformer
-
JLSZXW2-24 24kV Outdoor Three-Phase combined Combined Transformer
Related Knowledges
-
How to properly inspect and maintain a transformer?1 Transformer Testing and Protection Grounding is divided into working grounding and protective grounding. Working grounding: Grounding performed to meet the operational requirements of equipment.Protective grounding: Grounding implemented to prevent the metal enclosures of operating electrical equipment, structures of switchgear installations, and transmission towers from becoming energized, thereby endangering personal and equipment safety. Therefore, grounding of the transformer neutral pointOliver Watts10/18/2025 -
How to select a dry-type transformer?1. Temperature Control SystemOne of the main causes of transformer failure is insulation damage, and the greatest threat to insulation comes from exceeding the allowable temperature limit of the windings. Therefore, monitoring temperature and implementing alarm systems for transformers in operation are essential. The following introduces the temperature control system using the TTC-300 as an example.1.1 Automatic Cooling FansA thermistor is pre-embedded at the hottest spot of the low-voltage winJames10/18/2025 -
Comprehensive Analysis of Global Transformer StandardsComparison of Domestic and International Transformer StandardsAs a core component of power systems, the performance and safety of transformers directly affect grid operation quality. The IEC 60076 series standards established by the International Electrotechnical Commission (IEC) correspond multidimensionally with China’s GB/T 1094 series standards in technical specifications. For example, regarding insulation levels, IEC specifies that power frequency withstand voltage for transformers rated atNoah10/18/2025 -
How to Choose the Right Transformer？Transformer Selection and Configuration Standards1. Importance of Transformer Selection and ConfigurationTransformers play a critical role in power systems. They adjust voltage levels to suit different requirements, enabling electricity generated at power plants to be efficiently transmitted and distributed. Improper transformer selection or configuration can lead to serious issues. For example, if the capacity is too small, the transformer may not support the connected load, causing voltage droJames10/18/2025 -
How to handle transformer faults?Common transformer faults and their handling methods.1. Transformer OverheatingOverheating is extremely harmful to transformers. Most transformer insulation failures are caused by overheating. Rising temperature reduces the dielectric strength and mechanical strength of insulation materials. IEC 354, Loading Guide for Transformers, states that when the hottest spot temperature of a transformer reaches 140°C, bubbles will form in the oil. These bubbles can reduce insulation performance or cause fFelix Spark10/18/2025 -
How to Inspect 10kV Vacuum Circuit Breakers ProperlyI. Inspection of Vacuum Circuit Breakers During Normal Operation1. Inspection in Closed (ON) Position The operating mechanism should be in the closed position; The main shaft roller should be disengaged from the oil damper; The opening spring should be in a charged (stretched) energy-stored state; The length of the moving contact rod of the vacuum interrupter protruding below the guide plate should be approximately 4–5 mm; The bellows inside the vacuum interrupter should be visible (this does noFelix Spark10/18/2025
Related Solutions
-
Complete Solution for Central Air Conditioning System Retrofit in Mexican Office Buildings (American Standard Distribution Transformer)Ⅰ. Project Background & Pain Point AnalysisThe Mexican office building utilizes a 15HP commercial central air conditioning system originally powered by a single-phase 220V grid. Due to the lack of 380V three-phase driving voltage, the compressor startup current exceeds overload limits (measured at 3.2× rated current), causing refrigeration efficiency to plummet to 40%, accompanied by:Motor winding temperature rise exceeding standards (ΔT > 65°C), reducing insulation lifespRockwell05/19/2025 -
NEMA-Compliant Distribution Transformer Solution: Specialized Optimization for New Energy ManufacturingⅠ. Project ChallengesA lithium battery production line in Quebec required conversion of 575V three-phase power from the Canadian industrial grid to 220V single-phase power. The existing distribution transformer system faced:Harmonic interface: Voltage distortion affected precision control systems, reducing yield rates by 18%Energy efficiency loss: Conventional distribution transformers exhibited 0.8 power factor with notable reactive lossesEnvironmental adaptability: Humidity fluctuations in indRockwell05/20/2025 -
Localized Production and Strategic Collaboration Implementation Plan for Oil-Immersed Distribution Transformers in AfricaWenzhou Rockwell Transformer Co., Ltd. distributes power transformers to multiple African countries including Tanzania, Zambia, Rwanda, Ethiopia, Togo, Cameroon, and Malawi. With in-depth knowledge of local policies, we propose a collaborative plan to establish a manufacturing facility for oil-immersed distribution transformers and seek partnerships with qualified African entities.Ⅰ.Localized Production Strategy1. Market-Adaptive Capacity AllocationAlign production capacity with regional marketRockwell04/23/2025
Haven't found the right supplier yet? Let matching verified suppliers find you.
Get Quotation Now
Send inquiry
Download
Get the IEE Business Application
Use the IEE-Business app to find equipment, obtain solutions, connect with experts, and participate in industry collaboration anytime, anywhere—fully supporting the development of your power projects and business.
