Basler BE1-25 synchronous check relay

Basler BE1-25 synchronous check relay

Chapter 1 Overview, Models and Core Functions

1. Typical application scenarios

Simultaneous closing permit for generator grid connected circuit breakers;

After a power grid failure, the segmented switches coincide synchronously;

Synchronous monitoring of fast switching devices for factory power/substations.

2. Core synchronization check basic logic

Only when all criteria are met can the closing permission be output (SYNC contact closed):

Line/bus phase difference<panel set angle (adjustable from 1 to 99 °);

Continuous setting delay for qualified phase difference status (cycle range 1-99 weeks/second range 0.1-99 seconds);

The voltage of the wire and bus is higher than the minimum operating voltage of 80V (completely inactive below 20V);

Optional Δ V voltage differential locking: the voltage difference between the line and bus is less than the set value;

The circuit breaker assists in closing the normally closed contacts of the circuit breaker (opening the circuit breaker and unlocking the closing circuit).

3. Five optional voltage monitoring functions (Option 2 series)

There are 2 mode switches (bus/line independent) and 5 operating condition switches inside the panel, divided into NORMAL standard mode and NOT-OV overvoltage protection mode:

NORMAL mode: Below the set value=voltage loss Dead; Above setting=Live with electricity;

NOT-OV mode: Below lower limit=voltage loss; Between the upper and lower limits=normal charging; Exceeding the upper limit=overvoltage lockout;

5 operating condition switches can individually switch on and off 4 types of busbar/line combinations: live line+live busbar, lost line+live busbar, live wire+lost busbar, double line double busbar full voltage loss, meeting the logic of islanding and backup power self switching.

4. Δ V pressure difference monitoring (divided into two detection algorithms)

Phase difference (2-R/2-T/2-U): Based on the cosine theorem, the vector pressure difference is calculated, and the larger the phase, the smaller the allowable pressure difference;

Mean value difference (2-A/2-B/2-C): only compares the effective voltage value, independent of phase;

The adjustment range is 1~135Vac. If the pressure difference exceeds the standard, the synchronous output will be directly locked to reduce the impact of closing.

5. Optional Extended Phase Angle Window (Option 9)

Under emergency conditions, external contacts are triggered, and the synchronous allowable angle is amplified by 2/3 times (on-board jumper selection); Prohibited for use in generator circuits, excessive angles can cause significant mechanical impact.

6. Output and matching options

Synchronous main output: normally open E/normally closed F contact; Independent voltage monitoring auxiliary output G/H;

Press the test button on the panel: No external voltage is required, directly drive the output to verify the secondary circuit;

Target indicator: New electronic lock LED (power off, restore power), phasing out old mechanical discs; Divided into internal drive and loop current drive (requiring ≥ 200mA);

Two options for contact acquisition: isolated acquisition (internal power supply of relay), non isolated acquisition (external DC power supply);

Power type: 24Vdc/48Vdc/120Vac/125VDC/240Vac with multiple specifications;

7. Model coding rules (Style numbering)

Coding segmentation definition: sampling type, extended window, output type, delay level, power supply, target indication, contact acquisition, voltage monitoring, installation method (semi embedded/protruding S1 rack), with a complete coding comparison table and example analysis attached.

Chapter 2 Panel Controls, Indicator Lights, and Internal Switches

1、 External operating components on the front panel

Phase ANGLE dialing: 00~99 °, 00 locking synchronization function;

TIME DELAY delayed dialing: divided into 2 levels

A6: 0.1~99s (switching of the 0.1/1 magnification switch);

A7:1~99 power frequency cycle, no magnification;

Δ V fine-tuning knob: 1~135Vac, increase the pressure difference threshold clockwise, equipped with Δ V indicator light;

LL line live, LB bus, DL lost line, DB lost bus, NOT OV overvoltage fine adjustment potentiometer, each corresponding independent status LED;

Status indicator light group: POWER power supply, SYNC synchronization qualified, PHARE ANGLE phase qualified, various voltage status lights;

Reset button: Clear the lock fault target LED;

2 hidden test buttons: trigger synchronous output and voltage monitoring output respectively;

2、 Internal circuit board switch of the chassis

Bus/line MODE mode switch (NORMAL/NOT-OV);

5-way condition CONDITION on/off switch;

Expansion window magnification jumper (× 2/× 3);

3、 Permission and logical constraints

If E/F pure synchronous output is selected, the LL-LB (dual line live) operating condition switch must be set to OFF, otherwise it will skip phase verification and close directly, causing asynchronous accidents; The switch can only be turned on when the G/H independent voltage monitoring output is activated.

Chapter 3 Functional Principle Block Diagram of the Whole Machine

1. Signal acquisition link

Line/bus PT secondary voltage → internal step-down isolation transformer → zero crossing detection circuit → phase difference digital measurement unit, while branching and sending voltage amplitude sampling (peak/average circuits).

2. Phase synchronization determination process

Calculate the zero crossing time difference of lines and busbars, and convert the phase angle;

Compared with the panel angle setting, if it is less than the threshold, start timing;

All prerequisites for starting the timer: phase qualification, voltage ≥ 80V, opening of the circuit breaker with a voltage of 52B, qualified voltage difference Δ V (optional), and voltage conditions met;

Delay reaches the set value, drives the synchronous output relay, lights up the SYNC indicator light, and locks the target; Any condition disappears and immediately returns to output.

3. Voltage monitoring subsystem

The peak/average value detector reads the line and bus voltage, compares the LL/LB live threshold, DL/DB loss threshold, and NOT OV overvoltage threshold, and outputs logic levels in conjunction with internal mode/operating condition switches for locking synchronization or separately driving monitoring relays.

4. Contact acquisition and power module

The auxiliary contacts of the circuit breaker and the external expansion window contacts are isolated/non isolated for collection; The T-shaped high-voltage power supply needs to be equipped with an external acquisition module;

Wide isolated power supply, AC/DC non-polar input, built-in power supply abnormal alarm normally closed output;

5. Output circuit

There are clear limits on the AC/DC breaking capacity of synchronous output and voltage monitoring output contacts; Inductive coils connected in parallel with freewheeling diodes suppress EMI interference.

Chapter 4 Installation, Wiring and Maintenance

1. Mechanical installation

S1 standard 19 inch rack unit, two installation options: semi embedded and protruding; Provide complete dimensional drawings of openings, side views, and backboards;

No mandatory requirement for vertical installation, any angle is acceptable;

Grounding specification: The grounding terminal of the chassis should be ≥ 12AWG copper wire separately grounded to the grounding bar;

2. Wiring specifications

Main circuit: Line and bus PT secondary access terminals, supporting phase voltage/line voltage acquisition;

Control circuit: auxiliary circuit breaker with circuit breaker with circuit breaker with circuit breaker with circuit breaker with circuit breaker with circuit breaker with circuit breaker with circuit breaker with circuit breaker with circuit breaker with circuit breaker with circuit breaker with circuit breaker with circuit breaker with circuit breaker with circuit breaker with circuit breaker with circuit breaker with circuit breaker with circuit breaker with circuit breaker with circuit;

Output circuit: closing coil, alarm signal; Suggest reverse diodes for inductive loads;

Optional accessories: External voltage divider resistor module (remote working condition contact), high-voltage power supply matching contact acquisition module;

The plug-in bracket comes with a short connector, and the unplugging device automatically short circuits the PT twice, eliminating the risk of CT/PT open circuit high voltage;

The minimum wire diameter of the wire is 14AWG; The withstand voltage test must disconnect the connector;

3. Storage and maintenance

No regular maintenance, only annual functional verification of the entire machine;

Idle spare parts are powered on for 30 minutes every year to extend the lifespan of electrolytic capacitors;

Contact the manufacturer in case of hardware failure and do not disassemble without authorization.

Chapter 5 Standard Process for Whole Machine Debugging

1. Essential testing equipment

Dual adjustable AC voltage source, phase adjustment device, DC test power supply, timing instrument;

2. Pre debugging settings

All operating condition switches are set to UP (OFF), the potentiometer is initially reset to zero, and the synchronization delay is set to the minimum value; The two voltages are unified at 95Vac and have a phase of 0 °.

Step by step standardized testing

Phase and delay testing

Set the allowable angle, slowly increase the phase difference, and verify that the phase indicator light is on/off; Switch between 0.1s and 99s gear to verify timing accuracy (error ≤ 5%); The 00 angle gear must permanently lock the output.

Minimum voltage lockout test

The voltage drops to 80V and the synchronization function is normal; Completely inactive below 20V; The range of 20-80V depends on the characteristics of the components.

Voltage monitoring circuit test (LL/LB/DL/NOT OV potentiometer calibration)

Adjust the threshold of 10~135Vac separately and verify the critical point for each LED to light up.

Normal standard mode operating condition verification

Simulate double line electrification, single line voltage loss, and double line voltage loss separately, and verify the logic of the output contact action.

NOT-OV overvoltage protection mode verification

Lock synchronous output when verifying voltage exceeds the upper limit.

Δ V differential pressure function test

Fixed phase, increase voltage difference, and output lock synchronously when exceeding the set value.

Extended Window Function Test

The external contact is closed, and the synchronization allows for an angle amplification of 2/3 times.

4. Slip frequency conversion formula

The manual provides conversion curves for phase angle, delay, and slip frequency for on-site synchronous parameter tuning calculations.

Chapter 6 Electrical and Mechanical Specifications

1. Accuracy indicators

Phase angle: ± 0.5 ° or 5% of the set value (whichever is greater);

Delay accuracy: maximum 25ms or 5% at room temperature, ≤ 10ms/2% across the entire temperature range;

Δ V differential pressure accuracy: ± 0.5V or 5%;

Voltage monitoring threshold error ≤ 3%;

2. Electrical endurance and certification

Meet ANSI/IEEE C37.90 surge and RF immunity requirements; UL、 Industrial CE related certification; Insulation withstand voltage input to ground 2121VDC, input/output 1500Vac;

3. Environmental parameters

Working temperature -40~+70 ℃, storage -65~+100 ℃; Resistant to 15G impact and 2G broadband vibration; The maximum weight of the whole machine is 6.2kg.

4. Full range specifications of power supply

O (48Vdc)、R (24Vdc)、P (120Vac/125Vdc)、T (240Vac/250Vdc)， Distinguish between power consumption and input range.

5. Contact capacity

AC 120V long-term 7A; DC 250V short-term 30A (0.2s), long-term 7A; inductive load breaking only 0.3A.