BLUE JAY BJ-PR240 Series Manuale utente

User Manual

Tel: +0086-023-67628702 Email:tech@cqbluejay.com

www.cqbluejay.com

Add: 1802,Building 2,No.88,Jianxin East Road,Chongqing,400020,China

BJ-PR240 series

Motor Protect Relay

User Manual

Version 3.7

Revision 2022-8

User Manual

Tel: +0086-023-67628702 Email:tech@cqbluejay.com

www.cqbluejay.com

Add: 1802,Building 2,No.88,Jianxin East Road,Chongqing,400020,China - 1 -

Read me

When you use BJ-PR240 series intelligent motor protection relay, be sure to read this user

manual carefully, and be able to fully understand the implications, the correct guidance of

operations in accordance with user manual, which will help you make better use of BJ-

PR200 series motor protector, and help to solve the various problems at the scene.

1. Before the meter turning on the power supply, be sure that the power supply within the provisions

of the instrument;

2. When installation, the current input terminal must non-open, voltage input terminals must Non-

short circuit;

3. Communication terminal (RS232/RS485 or Ethernet) is strictly prohibited to impose on high

pressure;

4. Be sure the instrument wiring consistent with the internal system settings;

5. When communicating with the PC, instrument communication parameters must be consistent

with the PC.

●Please read this user manual carefully

●Please save this document

                                            User Manual 
Tel: +0086-023-67628702                                                                                                          Email:tech@cqbluejay.com 
www.cqbluejay.com 
Add: 1802,Building 2,No.88,Jianxin East Road,Chongqing,400020,China                                                  - 2 -
Directory 
- SUMMARIZE.................................................................................................................................- 4 -
- FEATURES ...................................................................................................................................- 4 -
- SPECIFICATIONS ........................................................................................................................- 5 -
- INSTALLATION AND START-UP ..................................................................................................- 9 -
1.- INSTALLATION ............................................................................................................................ - 9 -
1.- TERMINAL DEFINITION ...............................................................................................................- 11 -
TERMINAL DEFECATION .....................................................................................................................- 11 -
OPERATION MODE......................................................................................................................- 12 -
1- LCD DISPLAY SCREEN ............................................................................................................... - 12 -
2- PANEL LED INDICATOR ............................................................................................................. - 12 -
3- MOTOR CONTROL BUTTONS ...................................................................................................... - 13 -
3- CONFIGURATION BUTTONS ........................................................................................................ - 14 -
4- MEASUREMENT INTERFACE ....................................................................................................... - 15 -
5- CONFIGURATION INTERFACE ...................................................................................................... - 16 -
- RS485 COMMUNICATION PORTOCOL....................................................................................- 23 -
1.- MODBUS © PROTOCOL .......................................................................................................... - 23 -
1.1- Modbus RTU Frame Format:...........................................................................................- 23 -
1.2.- Modbus function code ....................................................................................................- 24 -
2.- MOTOR STATUS PARAMETER (READ ONLY, CODE 04) ................................................................ - 26 -
3.- MOTOR BASIC CONFIGURATION (READ AND WRITE)................................................................... - 29 -
4.- MOTOR PROTECTION FUNCTIONS CONFIGURATION (READ AND WRITE)....................................... - 30 -
5.- MOTOR START MODE CONFIGURATION (READ AND WRITE)......................................................... - 32 -
5.- SEQUENCE OF EVENT RECORD (READ ONLY, CODE 04)............................................................. - 33 -
5.- MOTOR ADVANCED CONTROL (READ AND WRITE)...................................................................... - 34 -
- PORTECTION FUNCTION INTRODUCTION .............................................................................- 35 -
1- START OVERTIME PROTECTION ................................................................................................. - 35 -
2- OVERLOAD PROTECTION........................................................................................................... - 36 -
3- JAM IN RUNNING PROTECTION (STALL)...................................................................................... - 40 -
4- JAM IN STARTING PROTECTION (ROTOR LOCKED)....................................................................... - 40 -
5- PHASE FAILURE PROTECTION.................................................................................................... - 40 -
6- CURRENT IMBALANCE PROTECTION ........................................................................................... - 41 -
7- GROUND FAULT PROTECTION.................................................................................................... - 41 -
8- UNDER POWER PROTECTION .................................................................................................... - 42 -
9- OVER TEMPERATURE PROTECTION............................................................................................ - 42 -
10- SHORT CIRCUIT PROTECTION .................................................................................................. - 42 -
11- OVER VOLTAGE PROTECTION .................................................................................................. - 43 -
12- UNDER VOLTAGE PROTECTION ................................................................................................ - 43 -

                                            User Manual 
Tel: +0086-023-67628702                                                                                                          Email:tech@cqbluejay.com 
www.cqbluejay.com 
Add: 1802,Building 2,No.88,Jianxin East Road,Chongqing,400020,China                                                  - 3 -
13- ABNORMAL FREQUENCY PROTECTION ..................................................................................... - 44 -
14- ABNORMAL POWER FACTOR PROTECTION................................................................................ - 45 -
15.- TE PROTECTION .................................................................................................................... - 45 -
8- MOTOR START MODE INTRODUCTION....................................................................................- 47 -
1.- ONLY PROTECTION MODE ......................................................................................................... - 47 -
2.- FULL VOLTAGE START MODE...................................................................................................... - 49 -
3.- FORWARD AND REVERSE START MODE....................................................................................... - 50 -
4.- TWO-WINDING START MODE ..................................................................................................... - 51 -
5.- WYE-DELTA TRANSITION MODE................................................................................................. - 52 -
6.- AUTOTRANSFORMER CLOSED TRANSITION MODE ...................................................................... - 53 -
7- CIRCUIT BREAKER DIRECTLY START MODE .................................................................................. - 54 -
- SAFETY CONSIDERATIONS.....................................................................................................- 55 -
- MAINTENANCE........................................................................................................................- 55 -
 

User Manual

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Add: 1802,Building 2,No.88,Jianxin East Road,Chongqing,400020,China - 4 -

1. - SUMMARIZE

PR240 motor protection relay is an all-in-one solution designed to continuously monitor 3-phase

power lines for abnormal conditions. It can use with motors less than 690V/820A. It can realize a

variety of control operation, as well as measurement, self-diagnosis, maintenance management,

field bus communication and other functions.

The series of products through the real-time monitoring of the scene signal, provide various

protection trip to avoid motor failure. Option RS485 communication port can upload the monitor

data and alarm status to remote control system.

Protection function

(Details please refer to chapter 7)

Real-time monitor parameter

Start Overtime (Max. Start time),

Over Load,

Phase Failure (Phase loss),

Jam in starting(Stall),

Current imbalance,

Under power,

Jam in running,

Ground fault,

Over temperature,

Short circuit,

Over voltage,

Under voltage,

Abnormal frequency,

Abnormal power factor,

tE protection (Increased safety motor

overload)

Automatic restart,

Three-phase current,

Three-phase line voltage,

Frequency,

Active power,

Reactive power,

Apparent power,

Power factor,

Electrical energy,

Ground residential current

2. - FEATURES

-. Various electrical parameter real-time detect, Dot matrix LCD display.

-. Built-in 4-channels relay, provide various start methods: Direct start, positive & negative start,

star - delta start, autotransformer start, 2-speed motor start, circuit breaker direct start and

protection trip logic.

-. User free to set each protection function act off, alarm or trip.

-. Build in Sequence of Event function, can logger last 100 trip records.

-. With programmable analog output function, user option RS-485 communication interface.

User Manual

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Add: 1802,Building 2,No.88,Jianxin East Road,Chongqing,400020,China - 5 -

3. - SPECIFICATIONS

Working environment:

Motor rated voltage:

AC380V / AC660V

Motor rated current:

0.5-820A

Working temperature:

-10C ~ +55C

Storage temperature:

-25C ~ +70C

Relative humidity:

< 93% RH

Elevation:

not more than 3000 m

Atmospheric conditions:

installation site does not allow the explosive medium,

containing gas to corrode metal and damage the insulation

and conductive medium.

Measuring accuracy:

Current:

±0.5% @ 10% to 200% of Ie

Voltage:

±0.5% @ 10%~150%Ue

Frequency:

±0.1% @ 45 ~ 65Hz

Power factor:

±1.0% @ 0 ~ 1.000

Active Power

±1.0% @ 0 ~ 500kW

Leakage current:

± 1% @10% to 100% of Ir

Analog Output:

±1% @4 ~20mA

Electrical parameters:

Auxiliary Power:

AC90-240Vac/dc

Power consumption:

<10 VA

Insulation resistance:

>100MΩ

Relay:

Alarm relay @ 5A / 250VAC, 5A / 30VDC (NO node)

User Manual

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Add: 1802,Building 2,No.88,Jianxin East Road,Chongqing,400020,China - 6 -

Electrical test:

IEC 61000-4-2

level III

IEC 61000-4-4

level III

IEC 61000-4-5

level III

IEC 61010-1

AC2kV/1min Between power / input / output

Product standards

GB / T 14048.1

(IEC 60947-1)

Low-voltage switchgear and control equipment General Provisions

GB /T14048.4

(IEC 60947-4)

Low voltage electromechanical contactors and motor starters

requirements

JB / T 10613-2006

General specification for digital motor combined protection

equipment

JB /T10736-2007

Low voltage motor protection

User Manual

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Add: 1802,Building 2,No.88,Jianxin East Road,Chongqing,400020,China - 7 -

Product selection guide

PR240- □-□□□-□-□

HMI cable

(Chart 3.3)

Optional function

(Chart 3.2)

Rated

current/volt(Power)

(0.5-820A)

Motor start method

(Chart 3.1)

Preset Motor Start method

Code

Protect only

Full voltage

Forward and reverse start

Two-Winding start

Wye-Delta Transition

Autotransformer Closed Transition

Chart 3.1

HMI cable length

Code

1-meter cable

3-meters cable

Chart 3.3

External protection CT selection guide, typical in 380V grid:

Motor rated

power (Kw)

Rated

current (A)

Internal

CT range

0.06

0.22

10A

0.12

0.42

0.37

0.55

1.5

0.75

1.1

2.5

2.2

6.5

5.5

100A

7.5

14.8

28.5

18.5

100

Motor rated

power (Kw)

Rated

current

(A)

Internal

External

135

10A

500/5

165

110

200

132

240

160

285

200

352

220

420

250

480

Notes: If motor rated current over 100A, need to connect

an external CT, Blue Jay suggest use 500/5A CT. In

Configuration menu-[CT ratio] set to 100.(See chapter

5.6.2)

Optional function

Code

With Zero sequence CT

4 ~ 20mA analog port

Temperature probe

SOE record

Notes: Standard type without additional function,

If need multiple additional functions the coded

arranged in sequence after main code.

Chart 3.2

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Add: 1802,Building 2,No.88,Jianxin East Road,Chongqing,400020,China - 8 -

Residual current sensor

If PR240 choose ground fault protection, need external LCT05/30 series CT for detect leakage

current.

LCT05 rated current of 500mA, the current range (50 ~ 500mA)

LCT30 rated current of 30A, the current range of (3 ~ 30A)

Each PR240 need 1pcs, please contact sales team for purchase issue.

Wiring core for cable type

Current

range

Dimension (mm)

16-100A

100-250A

112

122

250-400A

100

131

136

108

107

400-800A

150

200

209

100

145

184

177

Wiring core for cooper bar type

Current

range

Dimension (mm)

0-63A

100

133

144

140

2.0

0-100A

100

133

154

143

2.5

0-225A

140

172

189

184

2.5

0-250A

180

212

229

224

2.5

0-400A

220

254

269

264

2.5

0-630A

260

294

309

304

2.5

0-1600A

300

334

349

344

2.5

0-4000A

420

454

469

464

2.5

Notes: Protection function please refer Chapter 7.7

User Manual

Tel: +0086-023-67628702 Email:tech@cqbluejay.com

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Add: 1802,Building 2,No.88,Jianxin East Road,Chongqing,400020,China - 9 -

4.- INSTALLATION AND START-UP

The manual you hold in your hand contains information and warnings that the user

should respect in order to guarantee a proper operation of all the instrument functions

and keep it in safety conditions. The instrument must not be powered on and used until

its definitive assembly is on the cabinet’s door.

If the instrument is not used as manufacturer’s specifications, the protection of the

instrument will be damaged.

When any protection failure is suspected to exist (for example, it presents external visible

damages), the instrument must be immediately powered off. In this case contact a qualified

service representative.

4.1.- Installation

Mounting

PR240 series motor protection relay designed as separate 2 parts, one for din-rail mounting body,

another is panel mounting HMI.

Note that with the instrument powered on, the terminals could be dangerous to touch and cover

opening actions or elements removal may allow accessing dangerous parts. Therefore, the

instrument must not be used until this is completely installed.

Note: This connection drawing is for reference only; the actual connecting terminal please refer to

the label on the rear part.

Indice

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