Protrol IPS2 24 VDC Manual de usuario

Ver 1710 Rev 1

IPS2 24 VDC

Fault Detector

IPS2 24 VDC is a fault detector for overcurrent and directional earth

faults that indicates faults using its relay outputs and IEC 60870-5-

101.

Since the algorithm for earth fault detection does not require a

voltage transformer, IPS2 gives a very cost-efficient fault detection

with high sensitivity for pass through faults in impedance earthed

networks.

Ver 1710 Rev 1

M A N U A L

1 Contents

1Contents ___________________________________________________________________ 2

2Schematic Overview __________________________________________________________ 3

3Safety Information ___________________________________________________________ 4

4Functional Description ________________________________________________________ 5

4.1 Detector Function _______________________________________________________________ 5

4.2 Remote Terminal Unit Function ____________________________________________________ 7

4.3 System and service interfaces______________________________________________________ 8

5Hardware __________________________________________________________________ 9

5.1 IPS2 24 VDC Main Printed Circuit Board Rev. C ________________________________________ 9

5.2 IPS2 24 VDC Top Printed Circuit Board______________________________________________ 11

5.3 Protrol Tool for IPS2 ____________________________________________________________ 13

5.4 Setting the IPS2 to Service Interface Mode __________________________________________ 13

5.5 Communication Cable ___________________________________________________________ 13

5.6 Protrol Main Window ___________________________________________________________ 14

5.7 IPS2 Transient Fault Recorder_____________________________________________________ 16

6Configuration of IPS2 24 VDC __________________________________________________ 18

6.1 Creating or Adjusting a Configuration File ___________________________________________ 18

6.2 Download a Configuration File to the IPS2 Device_____________________________________ 21

7Testing and Commissioning of IPS2 _____________________________________________ 23

7.1 Binary I/O_____________________________________________________________________ 23

7.2 Current Injection Test ___________________________________________________________ 23

7.3 EF Trig Level Check _____________________________________________________________ 24

7.4 Test of IPS after Commissioning ___________________________________________________ 24

7.5 Offset Elimination (zero offset calibration) __________________________________________ 24

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2 Schematic Overview

RS232

Fault indication

Internal

port

012

PWR

I0>

IPS2

0 OFF 0.04 s

1 0.5x 0.1 s

2 0.75x 0.2 s

3 1.0x 0.4 s

4 1.5x 0.6 s

5 2.0x 0.8 s

6 2.5x 1.0 s

7 3.0x 2.0 s

OFF 0.04 s

1.0 A 0.1 s

1.5 A 0.2 s

2.0 A 0.5 s

2.5 A 1.0 s

3.0 A 2.0 s

5.0 A 5.0 s

10 A 30 s

I0> tI> t

X2 X3 X4 X6

Binary

inputs

123

C21 21

1AC 6

RS485

RX/TX

24-48 VDC

GND

2 3

Ack

012

I0>

EXT

LED

Figure 1. IPS2 24 VDC overview.

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3 Safety Information

The device should be connected to a ground terminal.

If the cover is removed, avoid contact with the main circuit board and terminals. The unit is

voltages.

If the unit is disconnected and the cover is removed, make sure that proper precautions are made

to protect the unit from electrostatic discharges.

When connecting and disconnecting the current terminals always short-circuit the current path to

avoid open circuits!

Short circuiting the current terminals when the earth fault detector is enabled is likely to be

interpreted as an apparent earth fault. If the EF detector has no binary input qualification enabled

the IPS2 unit should either be switched off or pluggable connectors in X2-X3 should be

disconnected.

Hint: This “feature” can be used for example in a test situation when the whole chain from IPS2 to

the SCADA system should be verified. When the IPS2 unit is in operation and there is a normal load

current it is usually possible to activate the earth fault detector by short-circuiting one phase on the

terminal screws with a short cable.

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4 Functional Description

4.1 Detector Function

True Fault Pass Through Earth Fault Detection

Protrol’s patented Fault Pass Through earth fault detection is suitable for all indirectly earthed networks. It

is capable of detecting high impedance and arcing earth faults. It analyses the transient nature of phase and

neutral currents and points reliably out the fault direction with respect to the measurement point. Note

that no voltage measurement is necessary for good selectivity at very low currents. The sensitivity is

comparable with that of a directional earth fault protective relay.

At an earth fault the detector will set itself into Trig state and evaluate if the fault is upstream or

downstream the unit. If the fault is downstream, it will switch to Start state. In this mode, the detector

evaluates the I0residual current until the Operation Delay has passed. If the residual is high after the set

time, the detector will enter Trip state.

Note that both a Start and a Trip indication means that an earth fault has occurred downstream the

detector. A Start without a subsequent Trip indication means that either the fault current is too low, or the

fault was of transient type and was gone after the Operation Delay time. Thus, the Start object, available

remotely, can be used as an early indication of an incipient fault.

Some periods after the disturbance has vanished, the detector returns to its normal state.

High I0Detection

The IPS2 supervision alarm for high residual current if the steady-state I0 current exceeds 16 times the I0

pickup level, as specified by the rotary switch on the front panel

The main purpose of this alarm is to indicate that something is wrongly connected, either wrong polarity or

missing phase.

An alarm is indicated by flashing the I0>LED, also see the Section 5.2 IPS2 24 VDC Top Printed Circuit

Board.

Overcurrent Detection

The IPS2 unit has one overcurrent stage that can be configured using the rotary switch at the front panel.

Phase Break Detection

The phase break detection alarm is activated - if one phase is “dead” while the other two are “alive”, a

phase break is signaled locally and on the system interface. A phase is considered “dead” if the current is

lower than the I0pickup level, and “alive” if the current is higher than 4 x the I0pickup level.

An alarm is indicated by flashing the I> LED, also see the Section 5.2 IPS2 24 VDC Top Printed Circuit

Board.

If the earth fault stage is deactivated, the High I0 steady-state limit is set to 160 A.

If the earth fault stage is deactivated, the “dead” threshold is set to 5 A while “alive” is 20 A.

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Output relays

The output power relays in the IPS detector enable direct operation of switching devices. Thus, it is possible

to disconnect faults before the protection in the distribution substation reacts, minimizing the

consequences for the users upstream the fault.

Fault acknowledgement

The LEDs including the external LED can be reset either by pressing the Ack-button or automatically when

the time of the Protrol Tool parameter LED flashing time has elapsed.

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4.2 Remote Terminal Unit Function

The IPS2 unit includes a Remote Terminal Unite (RTU) function that can be employed to share Start and

Trip information as well as other binary and analogue objects.

Binary objects

There are nine objects for internal signals and the two binary inputs of the IPS2 unit that can be transmitted

on the RS485 System Interface (Single Point) using the IEC 60870-5-101 protocol.

▪I0> Start

▪I0> Trip

▪I> Start

▪I> Trip

▪I0> Arcing

▪Phase break

▪Binary Input 1

▪Binary Input 2

▪High residual current

Analogue objects

Five analogue objects, three phase currents, residual current and fault detected phase, can be transmitted

for supervision/ information purposes. See the Table 1 Explanation of the Protrol IPS2 24 VDC Configuration

settings for more information.

Protocol

The available protocol is:

▪IEC 60870-5-101

Supported selection of ASDUs:

Standard range

Type ID

Description

<1>

M_SP_NA_1

Single-point information

<2>

M_SP_TA_1

Single-point information with time tag

<9>

M_ME_NA_1

Measured value, normalized value

<11>

M_ME_NB_1

Measured value, scaled value

<13>

M_ME_NC_13

Measured value, short floating point number

<100>

C_IC_NA_1

Interrogation command

<103>

C_CS_NA_1

Clock synchronization command

M_ME_NC_1 R32-IEEE STD 754

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4.3 System and service interfaces

The IPS2 unit has a system interface for RTU communication and a service interface for handling of

transient fault recorder data.

A hardware and a protocol configuration must be made to switch between the two different interfaces.

Hardware configuration is made with a jumper on a 3-pole header, see the coming chapter “IPS2 24 VDC

Main Printed Circuit Board Rev. ” for details.

The device protocol is switched by pressing and holding the ACK button until the changed mode is indicated

by a short flash on the I> or I0>LED.

System interface

The physical port for the system interface is the RS485 port (X5), see the chapter “Schematic Overview” for

connector placement.

The jumper in the 3-pole header must be placed in position 2 –3 for RS485 communication.

The device protocol is switched by pressing and holding the ACK button until the changed mode is indicated

by a short flash on the I0>LED.

The device is always initiated, after a power down or reset, with the system interface protocol activated.

Service interface

The physical port for the service interface is the internal RS232 port, see chapter “IPS2 24 VDC Main Printed

Circuit Board Rev. ” for details.

The jumper in the 3-pole header must be placed in position 1 –2 for RS232 communication.

The device protocol is switched by pressing and holding the ACK button until the changed mode is indicated

by a short flash on the I> LED.

Please observe that the IPS2 is always initiated, after a power down or reset, with the system interface

protocol activated.

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5 Hardware

The IPS2 unit is composed of two printed circuit boards (PCBs); one large circuit board forming the base and

a top circuit board that is located above of the other just beneath the front panel.

To access the reset button, firmware download port (C2 interface) and the internal serial port of IPS2, the

front cover must be removed. This is easily accomplished by removing the four screws in the corners of the

cover. Note that the screws need only to be turned 90 degrees.

5.1 IPS2 24 VDC Main Printed Circuit Board Rev. C

Pluggable Terminal Blocks

External cables are attached to the lower side of the IPS2 using pluggable contacts. For more information

about each conductor in the contacts, please refer to the Schematic Overview in Figure 1.

Figure 2. IPS 24 VDC Main PCB Rev C.

Service Port

C2 Port

Reset switch

3-pole header

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Reset button

Pressing the orange button results in a reset of the unit. All recordings from previous faults and events are

lost. Configuration settings are kept during reset.

Service Port

The service port connector is found on the upper side of the circuit board. The service port is used together

with any computer with Protrol Tool. Protrol Tool is a service tool for analysis of transient fault recordings

and is described more in details in the following chapter. Analysis requires the 9-pole DSUB adapter cable

with article number 606535.

C2 Port

Configuration of the IEC 60870-5-101 protocol is done using the C2 Port which is the grey socket labeled J6

on the Main PCB. Configuration is described in the following chapter, and requires the 9-pole DSUB adapter

cable with article number 606537.

3-pole Header

There is a 3-pole header located on the Main PCB. Using a jumper to short circuit two leads will configure

the IPS2 unit to use the RS232 Service Port or the RS485 System Interface. The connectors are number 1-2-

3 from left to right.

▪Jumper position 1 –2: RS232 Service Port

▪Jumper position 2 –3: RS485 System Interface Port.

The device protocol is switched by pressing and holding the ACK button until the changed mode is indicated

by a short flash on the I> or I0>LED.

A flash on the I0>LED indicates that the service protocol is activated.

The device is always initiated, after a power down or reset, with the system interface protocol activated.

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