CSDPR. Multi Powered Over-Current Relay

Multi Powered

Over-Current Relay

1 Introduction

2 Design

2.1 Analog Input 2.2 Front Panel 2.3 Keypads

2.4 Battery Power Key 2.5 LEDs

2.6 Fault Recording 2.7 Trip Output

2.8 Assignment of the Output Relays 2.9 Potential input

3 Communication

3.1 RS 485 Communication 3.2 Front USB Communication

4 Protection Function 5 Battery Pack 6 Terminal Detail 7 Technical Data 7.1 Measuring Input 7.2 General Data 7.3 Communication 7.3.1 Front Port RS 232 7.3.2 Rear Port RS 485 7.4 Setting Ranges and Steps 7.5 Voltage rating of Digital Input 7.6 Accuracy

7.7 Tripping Characteristics 7.8 Output Contacts Rating 7.9 Certified Type Test

8 Dimensional Drawing 9 Order Form

1. Introduction

2.

Design

The numeric multi powered Over-current Relay CSDPR is a universal protection device specially designed for ring main units & feeder protection. It combines the following functions in one unit:

Relay get energize either from Current ,Aux. Voltage, front USB, Solar module or internal battery (whichever is available)

O/C, S/C, E/F and E/F High Set protection

DEFT and Inverse characteristics for O/C and E/F, individually selected for phase and earth fault

Unbalance/ Asymmetric Protection

Potential pulse output for direct triggering the circuit breaker with potential free alarm contacts.

Remote Trip & Remote Protection Block input DI RS485-Modbus communication rear panel USB port for VIS (Virtual Injection System) Circuit breaker failure protection(50BF)

Wide operating ranges of the auxiliary supply voltage (AC/DC)

Last 5 Fault Record with Time stamp Solar Power Module Interface

Digital filtering of measured quantities by using discrete Fourier analysis to suppress harmonics/DC/Inrush Trip Counter for Breaker

Relay will get energized from any of the following available sources 1. Aux. Supply 2. CT Current 3. Internal Battery 4. USB Port 5. Solar cells

Relay will operate its trip contacts only when CT current is present or Aux. Supply is available, with other power sources the relay can only edit & view the parameters & records.

In the absence of Aux/Battery voltage/USB/Solar panel relay will get energized if CT current in single phase is at least 20% of rated current. [This is not true for Neutral CT, minimum required current must flow in phase]. In case of three phases, relay will get energize from 15% of rated current.

The Solar-Powered Relay:

CSDPR can be energized from small 6V/0.5W solar panel. It will not only save the battery but also keep energize the relay like an auxiliary/Battery powered relay. (Solar module plate is not the part of supply). l l l l l l l l l l l l l l 2.1 Analog Input

The analog input signal of the conductor currents as per the terminal detail section 7.3, are fed to the protective device via separate input transformers. The continuously measured current values are galvanically isolated, analog & digitally filtered and finally fed to the analog/digital converter to get the True RMS value.

2.2 Front Panel

The front panel of the protective device CSDPR comprises the following operation and indication elements:

lLCD ( 16 x 2) with Bright -Light

lKeypad with 5 keys: For setting of the parameters of the relay.

lPower On & off key to energize the relay from Battery

l10 LEDs for fault annunciation

lFront Battery cover to replace battery.

2.3 Keypads

The front panel keypad consists of five soft-touch keys. These keys are marked as “RESET/E”, “+”, “-” “>” and “<”. The “RESET/E” key provides reset function to the relay & act as Enter key for MMI. The keys marked “?” and “?” are meant for backward and forward scrolling respectively. The keys marked “+” and “-” are used for incrementing and decrementing selected parameter value.

2.4 Battery Power Key

Middle key is the Battery Power On key to energize the relay with battery. Press of BAT.OFF key will switch off the battery power supply or relay will get automatically switch off after 15sec if keys are inactive, to save the battery life.

2.5 LEDs

There are 10 LEDs on the front panel. Their functions are indicated by the appropriate inscriptions along with them. All LEDs are with Memory backup & they will maintain the previous status until fault is acknowledged through manual reset. The working is equivalent to a digital flag.

Blinking of these LEDs indicates the pickup of element & steady state indicates the trip.

2.6 Fault Recording

CSDPR records last 5 Faults. In Fault, it saves following information

Value at Fault : L1, L2, L3, E in Amps Type of fault : SC: / OL / U0 Time Stamp : HH:MM:Sec Date Stamp : DD:MM:YY

Fault recording is only possible with Aux. Supply/CT Current/Internal Battery Power/USB Powered

2.7 Trip Output

In presence of Aux Supply:

4 Po t e n t i a l Fr e e C o n t a c t s a n d 1 Po t e n t i a l O / P (24V/[email protected] /50msec ON Pulse). Duty Cycle will depend upon the strength of available current.

In presence of only adequate CT current:

1 Potential Free Latch Contact and 1 Potential O/P (24V/[email protected] / /50msec ON Pulse). Duty Cycle will depend upon the strength of available current.

Average 20% of the rated current must required in the phase to trip the breaker.

2.8 Assignment of the Output Relays

CSDPR has four output relays. One latch relay is available in all models(Except V1.0). Three extra programmable output relays available only in Auxiliary supply model. Relay reset operation can be configurable in automatic reset or manual reset mode from MMI . In automatic reset mode relay will be reset after the current goes below the pick-up level. In manual mode relay will be reset by pressing reset button.

*Auto/Manual option is not applicable for Latch Relay.

2.9 Potential Input

Two Potential DIs are available for control.

DI 1 : Remote Block for 50/50N/51/51N & Unbalance Protection DI 2 : Direct Remote Trip

DIs work only in case of Aux. Supply.

DI_1 : Blocking the Protection Functions

When this input, becomes high it will block the selected protections such as OL/SC /Earth/Earth-high set/U0. The selection of protections for blocking is done from MMI. Blocking will remain active till the potential is available on DI terminal. When DI 1 is low no protection will be blocked.

DI_2: Direct Remote Trip

In energized condition, irrespective of any pickup or fault user can trip the Circuit breaker, by applying voltage to Remote trip DI.

3.1 RS485 Communication

The CSDPR includes an RS485 communication on rear port .This port is available for “MODBUS™” protocol. CSDPR relay has feature to transmit the data such as settings, measurements and faults to the SCADA system . For this communication auxiliary supply is required. A communication failure dose not affects protection function.

3.2 USB Front Communication

The front USB Communication port is designed for “VIS-Injection System” for which the front end Software is provided. The S/w has features of testing the relay ,retrieving the records and changing the settings .

Note: Relay is plug & play on USB port. It automatically get energizes from USB port itself.

3. Communication

4. Protection

5. Battery Pack

CSDPR offers 50/51/ 50N /51N/ Unbalance/CBFP protections.

Overcurrent Characteristic : DEFT / VINV /EINV / NINV

Unbalance Protection(46):

This is provided by the relay tripping in phase unbalance greater than setting % difference in terms of maximum phase current Tib: [(IMAX- IMIN)/ IMAX]×100[%]

Circuit Breaker Failure Protection to CBFP

The C.B. failure protection is based on supervision of phase current during tripping events. This protective function becomes active only after tripping. The criteria is whether all phase currents are dropped to <5% x In within set time of tCBFP. If not, then CB failure is detected and the assigned relay is activated. Annunication relay for CBFP only manually reset.

Trip counter

CSDPR includes on inbuilt CB trip counter which gets incremented after every trip of breaker. it goes maximum up to 16000 counts and after that it get reset and after that it get reset to zero again. It can reset through MMI.

CSDPR can be powered from battery & it requires 4 AA battery cell. Battery pack is replaceable from front panel. Battery will energize the relay, so that relay can even work in absence of auxiliary supply / CT current or solar power.

Under power saving mode, Battery power will get automatically OFF, if no key is pressed for 15sec or press the OFF key.

CSDPR requires 4 no of standard AA cell in its battery bank. Life of the battery depends on hour of usage & battery-Ah. Li /Ni-Cd chargeable /non-chargeable battery of AA size is acceptable.

Terminal Name Terminal Description

L1-L3 (S1-S2) CT Terminal for Phase Current Inputs L1,L2,L3 Earth (S1-S2) CT Terminal for Earth Current Input

RS485(P1 –N1) RS485 Modbus Terminal ( P1- N1) (* feature available as per selected model) AI -1 Analog Input for Remote Trip

AI-C Analog Input Common for AI-1&2 AI-2 Analog Input for Remote Block Aux-P-Aux-N Auxiliary Supply for CSDPR

(* feature available as per selected model)

MHT(+) –MHT(-) Pulse Output for Magnetic Hold Trip Coil of Breaker SM(+) – SM(-) Solar Module Interface

(* feature available as per selected model)

RLY1 Relay 1 Common for all faults with NO Latch (NO-COMM) contacts

*RLY-2/3/4 (NO-COMM) Relay 2-4 assignable relays with NO contacts

(available in Auxiliary model only) *available in Auxiliary model only

6. Terminal Detail

7. Technical Data

Rated data Rated current IN :1A Burden : 2.5VA @ 1A

Frequency: 50 Hz

Thermal load capacity: Continuously : 2 x In 1s 20 x In Dropout Ratio : > 95%

7.1 Measuring Input

Rated auxiliary voltage UH Universal 24 VAC to 260 VAC 24 VDC to 360 VDC Rated supply for digital input Normal Voltage UN 80-230VAC

Power consumption of Aux supply Quiescent approx. 3W Operating appx 6W Dropout ratio > 95 %

Reset Returning time 30 ms

7.2 General Data

7.3.1 Front Port (USB)

Front Port CSE protocol with “VIS-LINK” on USB Cable Type A/A

7.3 Communication

Rear port protocol MODBUS RTU

Baud rate 2400,4800,9600,19200 (Editable) Parity NONE,EVEN,ODD (Editable)

Stop Bit 1 bit

Data Bit 8 bit data

Slave Address 1-32(Editable)

7.3.2. Rear port protocol

7.3.3 Solar Module Interface for Solar Module Interface:

SM+ /SM- Terminal Input voltage : 6V-35V DC Input range Suitable with 6V/0.5W Solar panel

Parameter Display Detail

DO assignment for Phase 1st stage Overload OL_RELAY RLY2 , RLY3 , RLY4 DO assignment for Phase 2nd Stage Overload SC_RELAY RLY2 , RLY3 , RLY4 DO assignment for Earth 1st stage Overload E_RELAY RLY2 , RLY3 , RLY4 DO assignment for Earth 2nd Stage Overload EH_RELAY RLY2 , RLY3 , RLY4 DO assignment for Self Supervision SupV_RY RLY2 , RLY3 , RLY4 DO assignment for CBFP CBFP_RY RLY2 , RLY3 , RLY4 DO assignment for Unbalance U0_RY RLY2 , RLY3 , RLY4

Parameter Display Detail

Relay assignment for Phase 1st stage Overload I> BLOCK / UNBLOCK Relay assignment for Phase 2nd Stage Overload I>> BLOCK / UNBLOCK Relay assignment for Earth 1st stage Overload Ie> BLOCK / UNBLOCK Relay assignment for Earth 2nd Stage Overload Ie>> BLOCK / UNBLOCK Relay assignment for Unbalance U0 BLOCK / UNBLOCK

7.5 DI Blocking for Protection

Parameter Display Setting range Step

1st Stage Phase Pickup I> 0.20 – 2.5 x IN 0.05 x IN DEFT Trip Time for 1st stage Overload t > 0.1 –150 s 0.01 s Inverse TMS for 1st stage phase Overload ti > 0.01 – 1.500 0.005 2nd Stage Phase Pickup I >> 0.5 – 25 x IN 0.5x IN 2nd Stage Phase Trip Time t >> 0.03 – 20 s 0.01 s Earth Fault 1st Stage Pickup Ie > 0.05 -2.5 x IN 0.05x IN DEFT Trip Time for 1st stage Earth Fault te > 0.03 - 150s 0.01s Inverse TMS for 1st stage earth fault overload Tie 0.01 – 1.500 0.005 2nd Stage Earth Fault Pickup IE >> 0.5 – 15x IN 0.05 x IN 2nd Stage Earth Fault Trip Time tIe >> 0.02 – 20 s 0.01s

Phase Unbalance Pickup U0 5 - 80% 1%

Phase Unbalance Trip Time t0 0.1-150sec 0.01s

Enable CBFP Protection Enable YES / NO

-CBFP Scan Time tcbf 0.03-20sec 0.1sec

CT Ratio for Primary Current Display CT Ratio 1-2500 1

Mode of Tripping Trip Type MHT/RLY/DUAL

-7.6 Setting Ranges and Steps

7.7 Voltage Rating for Digital Input (DI1 & DI2)

Operating Range: 80V-250V AC/DC (Non Polar with Common Terminal for both DI)

Tripping times with prefault : DMT: + 3% of the setting value+20msec IDMT: Accuracy as per IEC-255-3 (2 x Is to 20 Is) For VINV / NINV: + 5% +20msec or + 30 msec

(which ever is higher)

For EINV : + 7.5%+20msec or + 30 msec

(which ever is higher)

For ( < .20 X Is) : + 7.5%+20msec or + 30 msec

(which ever is higher)

Pickup Accuracy: +5%

Tripping time without prefault Standard time+ Additional delay

≤　２５０　

7.9 Tripping characteristics (IEC 255-3 or BS 142)

7.10 Output Contact (relay specs)

Number of relays : 4

Relay Contacts (RLY: 2,3,4) Configurable & available : Relay, 2, 3 and 4 are user programmable for I >, I >>, Ie only with Auxiliary supply model > and Ie >>,CBFP , Unbalance

Relay Contacts :1 (Available in all models) Latch type of relay common for all protections Max. breaking capacity : 1250 VA / 150 W resistive

500 VA / 90 W inductive Max. breaking voltage : 400 V AC, 125 V DC Max. continuous AC current : 5 A

Max. making current (16 ms) : 20 A

7.11 Certified Type Test

Environmental conditions

(Recommended Ambient temperature range) Operating Temperature Range:

Continuous Withstand -25 to +60°C

Limit(Note 1) -25 to +70°C. Storage Temperature Range: -25 to +70°C

Note: The upper limit is permissible not for continuous period.

Mechanical environment.

Vibration Test : IEC 60255-21-1, class 2. Shock: IEC 60255-21-2, class 1.

S.No Description of test Standard

1 Insulation test EC 60255-5

2 Dielectric test IEC 60255-5

3 5 KV impulse voltage test IEC 60255-5 4 High freq interference test severity class 3 IEC 60255-22-1 5 Radio interference suppression test EN55011 cl 5.1.2 6 Radio interference suppression test EN55011 cl 5.22.2 7 Radiated radio freq electromagnetic IEC 60255-22-3

field immunity test

8 Conductive RF immunity test ENV50141

9 Surge immunity EN61000.4.5

10 ESD test severity class 3 EN61000-4-2 11 Fast transient disturbance test IEC 60255-22-4 12 Power frequency magnetic Field immunity test IEC 61000-4-8

0.14/0.06

Normal Inverse 3.0/1.3 = ti [s]

(I / I ) – 1

13.5

Very Inverset = ti [s]

(I / I ) – 1

80

Extremely Inverset = ti [s]

(I / I ) - 1

ti: TMS for Inverse Characteristic t: Definite delay in DEFT characteristic

O/L, S/C, E and EH protections are available with DISABLE option in HMI.

8. Dimensional Details

Side View

Back View

8. Dimensional Details

For Example: CSDPR-V1- 2ACS

CSDPR

-V1-Potential O/P Pulse

[email protected]

2

[email protected]

1

With Aux. Supply

Without Aux. Supply

Communication : Modbus(RS-485)

Without Communication

---With Solar Interface option

-S-Without Solar Interface option

-x-CSDPR

Branch office

Branch Phone Fax E-mail

Ahmedabad: +91 79 30074534/35/36 +91 79 30074519 [email protected] Bangalore: +91 80 3057 0372/73, 3057 0347 +91 2558 4839 [email protected] Bhubaneswar: +91 674 2507265 +91 674 2507265 [email protected] Chennai: +91 44 3918 0531-35 +91 44 39180514 [email protected] Cochin: +91 0484 3071717 +91 0484 3071716 [email protected] Delhi: +91 11 30838822-25 +91 11 30838826 [email protected] Hyderabad: +91 40 3918 2496/97 +91 40 3910 3631 [email protected] Kolkata: +91 33 22275850/51 +91 33 2227 5849 [email protected]

44, Okhla Industrial Estate, Phase -III, New Delhi -110 020 (INDIA)

Phone : +91 11- 66602414, 30883745/54/64 Fax: +91 11- 6660 2413 E-mail: [email protected]

C&S Electric Ltd.

(Protection & Control Division)

For further information, please contact:

Issue Date : 10-10-2010 Rev. Date : 10-10-2010 Rev. No : 00