Category: GE

The GE Multilin PQMII Power Quality Meter is an ideal choice for continuous monitoring of a

single or three-phase system. It provides metering for current, voltage, real power, reactive

power, apparent power, energy use, cost of power, power factor, and frequency.

Programmable setpoints and four assignable output relays allow control functions to be

added for specific applications. This includes basic alarm on over/under current or voltage,

unbalance, demand-based load shedding, and capacitor power factor correction control.

More complex control is possible using the four switch inputs; these can also be used for

status information such as breaker open/closed and flow information.

As a data gathering device for plant automation systems that integrate process,

instrument, and electrical requirements, all monitored values are available via one of two

RS485 communication ports running the Modbus protocol. If analog values are required

for direct interface to a PLC, any of the monitored values can output as a 4 to 20 mA (or 0

to 1 mA) signal to replace up to four (4) separate transducers. A third RS232

communication port connects to a PC from the front panel for simultaneous access of

information by other plant personnel.

Feature Highlights

• Monitoring: A, V, VA, W, var, kWh, kvarh, kVAh, PF, Hz

• Demand metering: W, var, A, VA

• Setpoints for alarm or control from most measured values, including: unbalance,

frequency, power factor, voltage, and current

• four (4) output relays / four (4) switch inputs for flexible control configuration

• four (4) isolated analog outputs replace transducers for PLC interface

• one 4 to 20 mA analog input

• Modbus communications

• Three COM ports (two rear RS485 ports and one front RS232 port) for access by

process, electrical, maintenance, and instrument personnel

• Harmonic analysis for power quality review and problem correction

• 40-character display and keypad for local programming

• No-charge EnerVista PQMII Setup Software

• Simulation mode for testing and training

• Compact design for panel mount

• AC/DC control power

Applications of the PQMII

• Metering of distribution feeders, transformers, generators, capacitor banks, and

motors

• Medium and low voltage three-phase systems

• Commercial, industrial, utility

• Flexible control for demand load shedding, power factor, etc.

• Power quality analysis

• System debugging

Software

The EX2100e uses the ToolboxST* application for

configuration and diagnostics and retains all attributes for

high-speed analysis of rotating machinery and the enhanced

look-and-feel of plant-level Distributed Control System

software. For example, the ToolboxST application can analyze

and configure I/O modules, controllers, networks, and

operator stations for generator controls, turbine controls, and

balance-of-plant controls to simplify maintenance.

Proven Technology

While controllers, networks, I/O modules, and software tools

are upgraded, the heart of the system remains the same.

Proven control and protection algorithms remain unchanged.

Similarly, mission-critical power bridge technology is carried

over from the EX2100 power conversion assemblies.

In addition, control cabinet footprints are unchanged and

compliance to international regulations and standards is retained.

HYDRAN 201Ci-1 One Channel Controller

Remote electronic controller for oneHYDRAN 201T/ Intelligent Transmitter;

itprovides network communication capabilitiesplus a large display of gas

level as well as alarmcontacts, alarm indicators and analog outputs.

** When ordered in conjunction with a H20ITi, this combination iscommonly

referred to as a HYDRAN 201R Model i.

General

Components

Electronic unit housed in a weatherproofenclosure, suitable for

outdoor installation

Application

Monitoring of one H201Ti IntelligentTransmitter and access point for a

networkup to 128 H201T/’s via a single RS-232computer communication

port, eitherlocally or through an optional modem

Electronic Unit

Display TypeDigital, Light Emitting Diodes (LED),0-1999 ppm

Standard Analog Output

Non-isolated, jumper-configurable as 0-1 mA or 4-20 mA (10 V max. output),

0-1 V or 0-10 V; 0-2000 ppm scale

2nd Optional Analog Output

Isolated, jumper-configurable as 0-1 mA, 4-20 mA, 0-1 V or 0-10 V;

1500 V RMS isolation level; 0-2000 ppm scale

Gas Hi and Hi-Hi Alarms

Duplicate alarms in the H201Ti for Level,Hourly Gas Trend and Daily

Gas Trend

Fail Alarm

Duplicates alarm in the H201Ti for power failure, loss of communications,

sensor or other system malfunctions; upon system fault, display is

blanked and analog outputs are set to zero

Application

High burden tripping relays: Types MVAJM 15. 25. 41. 45

These relays are suitable for use in high security circuit breaker tripping circuits. In

particular they can be used in distributed tripping or control relay contact logic

schemes where the initiating contact may be remote from the relay.The high burden

provides immunity to capacitance discharge currents, which can result at the inception

of an earth fault on battery wiring and immunity to the subsequent leakage current.

The high burden relays are recommended for use with series connected operation

indicators, supervision relays and series seal-in units on protective relays.

Low burden tripping relays: Types MVAJM 11. 13

These relays are suitable for applications where immunity to capacitance discharge and

high minimum operation current are not required. These relays are generally used

when a number of simultaneous operations are to be initiated by a single protective

relay having insufficient contacts of its own and where series connected operation

indicators are not used.

Control relay: Type MVAJM 14

This is an electrically reset control relay. The relay is meant for switching the secondary

circuits of current transformer in busbar protection. Also wherever “latch-in” type of

control relay is required for contact multiplication control schemes, relay type MVAJM

14 can be employed.

Models available

Type MVAJM relays may broadly be divided into three groups:

! High burden tripping relays

! Low burden tripping relays

! Control relays

Features

! High speed operation

! High degree of mechanical stability

! Positive action without chatter

! Proof against high capacitance discharge currents

Customer Benefits

! Directly operates circuit breaker trip coils

! High reliability

! High speed operation

! Immunity to wiring capacitance discharge

Operation

When the relay is switched  the high speed unit will operate inside 4 milliseconds followed

shortly after by the MVAA. The outgoing contacts of the two units are in parallel so to give

high speed and the breaking capacity. By using a low value resistor in parallel the 10 uF

capacitor discharge is overcome. As the MVAA 11 operates it switches out the MVAA16

and parallel resistor to lower the burden to an acceptable level.

Results

Pick up range: 87.5-  137.5V

Pick up time: 4 milliseconds  over voltage range

Drop off time: 15 milliseconds

Initial Burden  180 watts at 137.5 volts for 4 milliseconds  reducing  to 65 watts and finally

6.8 watts after 15 milliseconds.

The MVAJ31 is built on similar lines to the MVAA 16 and followed by an MVAA11 using a

mixture of standard  and heavy duty contacts. In order to meet the capacitor discharge

test some resistors and internally  wired contacts  have been added.

Case Size

The relay may be housed in either  MIDOS  size 3 or size 4 cases. The heavy duty contacts

are as for the MYAA II  so the same contact duties can be claimed.  All other outgoing

contacts  are as standard  MVAAs.

Key Benefits

• High speed operation

• High and low burden alternatives

• Models surge proof against high capacitance discharge currents in the dc supply system,

are available

• Control relays immune to AC can be supplied

Description

Low Burden Tripping Relay Types MVAJ 11. 13. 14

These relays are suitable for applications where immunity to

capacitance discharge and high minimum operation currents are

not required.

Control Relay Type MVAJ 34

This is a dual-rated electrical-reset relay, the main function of

which is to switch protection and autoreclosing equipment in and

out of service from a remote point via pilot wires. It complies with

NGC SPEC. NGTS2.19:1996.

High Burden Tripping Relay Types MVAJ 21. 23. 25. 26. 27

Versions have one or two contact stacks depending on the number

of output contacts required.

Type MVAJ 21 High Burden Self-resetting Relay

This uses a contact on the main contact stack to energize a

separate, rear-mounted economizing element. After operation,

this reduces the burden by switching in resistance in series with

the main element and switching out shunt resistance.

Figure 2 shows a typical circuit diagram for self-resetting relays of

this type with high speed economy. When the main attracted

armature unit RL1 is energized by the protection contact PR, a

contact RL1-a energizes auxiliary element RL2. When contacts

RL2-a and RL2-b open, resistor R4 is put in series with RL1 while

the circuit to resistor R2 is broken.

High Burden Tripping Types MVAJ 21. 23. 25. 26. and 29

These relays are suitable for use in high security circuit breaker tripping circuits.

particular they can be used in distributed tripping or control relay contact logic

where the initiating contact may be remote from the relay. The relays have a high

which is either cut-off at operation or economized to a low figure, either

or after a time delay.

The high burden provides immunity to capacitance discharge currents, which can result

the inception of an earth fault on battery wiring and immunity to the subsequent

current.

The high burden also permits the use of supervision relays such as type MVAX where

wiring is at risk and provides reliable operation of series elements such as repeat

type MCAA. For the latter purpose, type MVAJ relays can be provided with a time

economizing feature.

Control Relay Type MVAJ 34

This is a dual-rated electrical-reset relay, the main function of

which is to switch protection and autoreclosing equipment in and

out of service from a remote point via pilot wires. It complies with

NGC SPEC. NGTS2.19:1996.