| Brand | ROCKWILL |
| Model NO. | BPR Series Regulator Bypass Switch |
| Rated voltage | 15kV |
| Rated normal current | 600A |
| Series | BPR |
Chance Type BPRS Station Class Regulator Bypass Switch provides a safe and economical means to bypass voltage regulators. The BPRS is designed for use on station class voltage regulators that can be set on neutral. The BPRS is single pull, sequenced so there is no chance of operator error and uses the same interrupter used on our AR Switches to interrupt the excitation current without an external arc. It is unidirectional and so must always be installed in a single source/load configuration. The BPRS uses ESP Enhanced Silicone Polymer as the primary insulating material. It has current ratings of 600A and 1200A and can be offered at 15kV 150kV, 29/38kV 200kV BIL. The BPRS achieves this station class insulation levels by using a TR rated 3" BC porcelain insulator to provide the additional leakage to ground. The base is the same as on our M3S disconnects and is perfect for direct mounting to steel structures. Chance: The Brand and Quality You Can Trust!!
Fully Compliant with ANSI/IEEE C37.30.1
For Station Class Regulator Bypass Applications
Designed for use with Regulators that can be set on Neutral
Single Pull Sequenced Operation
15 & 27/38kV Voltage Classes
150 & 200kV BIL Insulation Levels
600A and 1200A Current Ratings
TR Rated Post Insulator to provide standoff for most substation requirements
Utilizes the Interrupter on our AR Automation Ready Gang Operated Switches
Station Base for Structure mounting
Designed for Applications
By design, the BPR Regulator Bypass switch allows undisturbed continuity of service and provides an economic means for bypassing and disconnecting a distribution or substation voltage regulator for maintenance. It is designed for use with all voltage regulators that can be set on neutral for the switching operation. This includes all single and three phase regulators except three-phase induction regulators.
The BPR Switch is automatically sequenced to bypass the voltage regulator with a single pull operation, without interrupting service to the system. That is, the voltage regulator is always bypassed in proper sequence without any specific operation actions by the operator.
Parameters
-
Why Regular Transformer Maintenance Matters: 5 Serious Consequences of Neglecting ItI. Allowable TemperatureWhen a transformer is in operation, its windings and iron core generate copper loss and iron loss. These losses are converted into heat energy, causing the temperature of the transformer's iron core and windings to rise. If the temperature exceeds the allowable value for a long time, the insulation will gradually lose its mechanical elasticity and age.The temperature of each part of the transformer during operation is different: the winding temperature is the highest, folRockwell09/12/2025 -
How to Implement Condition-Based Maintenance for Power Transformers? A Complete 4-Step Process Analysis1. Definition of Condition-Based MaintenanceCondition-based maintenance refers to a maintenance method where decisions on whether and how to perform maintenance are determined based on the real-time operating status and health condition of equipment. It has no fixed maintenance methods or schedules. The prerequisite for condition-based maintenance is the establishment of equipment parameters and the comprehensive analysis of various operational information of the equipment, so as to make reasonaNoah09/12/2025 -
Can't choose a dry-type transformer? Get expert advice – free.Traction Rectifier TransformersRated capacity: 800 to 4400 kVA; Voltage class: 10 kV and 35 kV; Rectifier pulse number: 12-pulse and 24-pulse. Compared with 12-pulse rectifier circuits, 24-pulse rectifier circuits can reduce the harmonic pollution of the power grid by 50%, and no filtering equipment is needed at this location. It is suitable for power supply systems of urban subways and rail transit.Excitation Rectifier TransformersRated capacity: 315 to 3000 × 3 kVA; Voltage class: 10 kV, 13.8Vziman09/12/2025 -
SG10 Series Transformer Overload Protection Solution | Prevent Overheating and Damage, View NowOperating Conditions in National Standard GB 6450-1986Ambient temperature: Maximum ambient temperature: +40°C Daily average maximum temperature: +30°C Annual average maximum temperature: +20°C Minimum temperature: -30°C (outdoor); -5°C (indoor) Horizontal axis: Product load; Vertical axis: Average coil temperature rise in Kelvin (note: not in Celsius).For Class H insulation products, the long-term temperature resistance of insulation materials is stipulated by the state as 180°C. However, the inRockwell09/12/2025 -
High harmonics? Your transformer may be overheating and aging fast.This report is based on the analysis of one-day power quality monitoring data of your company's distribution system. The data shows that there is significant three-phase current harmonic distortion in the system (with a high total harmonic distortion of current, THDi). In accordance with international standards (IEC/IEEE), harmonic currents at this level have posed substantial risks to the safe, reliable, and economical operation of the power supply transformer, mainly manifested in additional hLeon09/12/2025 -
Ultimate Guide to AC Contactor Abnormal Noise: From Electromagnetic Noise to Mechanical Vibration, Accurate Diagnosis and HandlingIn electrical control systems, AC contactors are among the commonly used electrical components, and they are also a common source of various electrical faults. After long-term use—especially in harsh environments with high levels of dust—AC contactors may sometimes emit squeaking or rattling noises after being pulled in and held. The causes of this phenomenon are analyzed as follows.Squeaking Noise After Pull-In and HoldingA fully functional AC contactor makes no noise when energized and pulledFelix Spark09/11/2025
-
Intelligent Operation Solution for 12kV Vacuum Circuit Breakers: Integrating Real-time Monitoring & Lifetime OptimizationⅠ. Equipment Operation & MaintenanceIntelligent Monitoring System IntegrationMulti-parameter Real-time Monitoring: Embedded sensors (temperature, displacement, Hall effect current sensors) track contact temperature rise, mechanical characteristics (opening/closing speed, overtravel), coil current, and partial discharge signals. Data undergoes preprocessing via edge computing prior to cloud upload.Lifetime Prediction Model: Dynamically evaluates remaining lifespan using electrical wear dataRockwill06/10/2025 -
SF6 Circuit Breaker Solutions for Outdoor Installation (Anti-Pollution & Seismic Resistance)I.Core Challenges in Outdoor InstallationIn high-voltage transmission and distribution systems, SF6 circuit breakers are exposed to complex outdoor environments for extended periods, facing the following critical issues:Pollution & Insulation DegradationDust, salt fog, and industrial pollutants in outdoor environments easily adhere to equipment surfaces. In coastal or industrial areas, pollution levels may reach Class IV, resulting in insufficient creepage distance and triggering flashoRockwill05/12/2025 -
12kV Indoor Vacuum Circuit Breaker Southeast Asia Solution: Anti-Corrosion Compact Design12kV Indoor Vacuum Circuit Breaker Southeast Asia Solution: Anti-Corrosion Compact DesignⅠ. Executive SummarySoutheast Asia faces rapidly growing electricity demand alongside environmental challenges including high temperatures, humidity, salt spray corrosion, and grid instability. This solution recommends Solid Insulated Pole-Mounted Vacuum Circuit Breakers (VCB) featuring high reliability, compact design, and smart monitoring. Tailored for tropical climates and industrial scenarios, itRockwill06/10/2025
