SFK-T5, T6 Series Switches-Xinxiang Shengyuan Electric Co., Ltd.

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Overview

The synchronous switch is a newly developed type of capacitor switching device specifically designed to address the drawbacks inherent in AC contactors and composite switches when used in low-voltage reactive power compensation systems. It represents a seamless integration of mechanical switching technology with cutting-edge microelectronic innovations, offering numerous advantages such as low power consumption, smooth and surge-free switching, insensitivity to harmonics, and highly effective compensation.

Technical specifications

Operating voltage: 400V ±10%
Rated frequency: 50 Hz ± 5%
Control Capacity: Three-phase Common Compensation △-Type: ≤30 kVar
Single-phase split-compensation Y-type: ≤3 × 10 kVar, Insulation rating: ≥10 MΩ under normal atmospheric conditions
Control Method: RS485

Key Features

① Zero-transition switching:
Precisely control the timing of switching operations, ensuring that the system responds when the rate of change in grid voltage and current drops to zero, thereby achieving a seamless switch with no inrush current or harmonic distortion.
② Low power consumption:
Thanks to the use of a magnetic latching relay, the control device consumes power only during the switching operation—remaining completely energy-efficient at all other times. Additionally, because the magnetic latching relay has low contact resistance, it generates minimal heat. This eliminates the need for external heat sinks or fans, further reducing costs and power consumption, ultimately achieving the goal of energy conservation and efficiency.
③ Users do not need to set the capacitor capacity— the measurement and control instrument automatically adjusts the compensation effect, ensuring the power factor reaches the user’s preset level.

Model Naming

SFK-T5 and T6 Series Synchronous Switches
SFK - T5 / 30 / F / 250 / A
丨丨丨丨丨丨
① ② ③ ④ ⑤ ⑥
①: Product Code: SFK
②: Product Categories: T5, T6 Series
③: Rated Capacity: 5–40 kvar
④: Compensation Method: (F: Fractional Compensation, S: Shared Compensation)
⑤: Rated Voltage: 250V, 450V
⑥ : A: 12V B: 12V + Miniature Circuit Breaker
C: Network Port D: Network Port + Miniature Circuit Breaker

V. Key Points for First-Time Use

Panel display and button operation:

The capacitor’s initial power-on ID is 000, followed by automatic ID matching. When the capacitor is in networked status, the indicator light will flash automatically; once networking is successful, the fault light will stop flashing.
Automatic mode switches ID, AB, BC, and CA phase voltages using the ↑↓ keys.

Fault alarm light: The fault light flashes once to indicate that the device is not networked.
The fault light flashing 3 times indicates a phase failure.
Switching indicator lights: For single-phase separate compensation, the indicator light corresponding to phases A, B, and C will illuminate when the system is switched on, while the corresponding cut-off indicator light will turn off.
Three-phase common compensation: When activated, the ABC indicator lights up, while the deactivation indicator turns off.

Automatic status:

Manual mode:

Manual mode: Press ↑ to engage, press ↓ to disengage.

Installation and Overall Dimensions

Rail installation, screw installation
The rail clip saves time and labor while also offering a traditional screw installation option, catering to various application scenarios.

1. T5 Series Installation Diagram

2. T6 Series Installation Diagram

Wiring Diagram (Note for orders of network port type and DC12V type)

12V Control
Common Terminal: V1: Common Terminal 12﹢; K1: Control Terminal 12 -

12V Control
Split supply: V1: Common terminal 12﹢
K1: Phase A Control Terminal 12 -
K2: Phase B Control Terminal 12 -
K3: Phase C Control Terminal 12 -

The total control does not exceed 60 channels, with one supplementary unit providing 3 channels and a second supplementary unit adding 1 more channel.

keyword：

not have

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