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GE MVAJ 05/10/20 Tripping and Control Relays

MVAJ 10. MVAJ 20

When configured for high burden applications, the burden is

either cut off or is economised to a low figure after a 40-60 ms

time delay. Due to the greater minimum operating current, the

high burden application also permits the use of supervision relays

such as type MVAX 11. where the wiring is at risk. The 40- 60 ms

time delay ensures reliable operation of series elements such as

type MCAA repeat relays.

Type MVAJ 102 relay is specifically designed for applications

requiring a tripping relay which is self-resetting after a nominal

delay of 2.5 seconds. This relay may be used, for example, for

inter-tripping between higher voltage and low voltage circuit

breakers of a large 3-phase power transformer.

This may become necessary when the high voltage circuit

breaker is tripped after a heavy internal fault by protection

which cannot conveniently provide an auxiliary contact with a

dwell time long enough to ensure correct tripping of the low

voltage circuit-breaker.

Typically, the relay is initiated by transformer protection, such as

overall protection, restricted earth fault and Bucholz relays, in

arrangements where both the HV and LV circuit-breakers are to

be tripped simultaneously.

The HV breaker may be expected to trip more quickly than the LV

breaker so the tripping signal is maintained by the delayed reset.

This ensures complete clearance by the LV circuit-breaker, even

though the fault may have been cleared largely by the HV breaker

and the protection has started to reset.

GE MVAJ 05/10/20 High Burden Application

High Burden Application

These relays, supplied as high burden, are suitable for use in high

security circuit-breaker tripping circuits. The high burden provides

greater immunity to capacitance discharge currents, which can

result at the inception of an earth fault on battery wiring. This

makes the relays particularly suitable for use in distributed

tripping or control relay contact logic schemes, where the

initiating contact may be remote from the relay.

MVAJ 05

When configured for high burden applications, the burden is

either cut off at operation or is economised to a low figure

instantaneously.

Low Burden Application

These relays are suitable for general applications where the

initiating contact is located close to the relay. When configured

for low burden applications, by removing the external link from

terminals 22 and 24. the burden is either cut off during operation

or is economised to a low figure instantaneously.

GE MVAJ 05/10/20 Models Available

Models Available

• Trip relays

Trip relays possess a standard hand-reset flag and operate within 10 ms.

Table 1 shows  the trip relay versions available

• Control relays

Control relay variants of each trip relay are available. These relays operate within

approximately 15 ms

All relays configured for high burden applications are suitable for DC operation only

Applications

Self-reset relays reset when the initiating signal is removed,

making them suitable for use as trip relays in auto-reclose

schemes and also for general flagging purposes. Hand-reset relays

require manual resetting, making them effective lockout relays

which are commonly used to trip circuit-breakers associated with

transformers. Electrical-reset relays require a voltage to be

applied to the unit to reset the contacts. These relays may be

used in auto-reclose schemes, or where remote resetting of the

relay is required.

Trip Relay

With the exception of the MVAJ 102 time delayed self-reset

relays, all trip relays are suitable for either low burden or high

burden applications.

GE MVAJ 05/10/20 Low Burden Application

Protective relays are precise measuring devices, the contacts of which

should not be expected to switch large electrical loads.

In some cases, the protective relay can trip a circuit- breaker directly,

or according to coil rating and the number of circuits to be energised.

The MVAJ relay interfaces with the protection to provide: higher contact

additional contacts for tripping multiple circuit-breakers, control functions,

signalling interlocking.

The MVAJ range comprises very reliable hinged armature relays designed

to operate circuit-breaker trip coils. Built to very high specifications, the

MVAJ range a highly flexible and reliable link between the protective relays

and the circuit-breakers.

Low Burden Application

These relays are suitable for general applications where the

initiating contact is located close to the relay. When configured

for low burden applications, by removing the external link from

terminals 22 and 24. the burden is either cut off during operation

or is economised to a low figure instantaneously.

ZYGO Guardian™ Industrial Enclosure

Optimize efficiency by using your ZYGO optical profiler right on the shop floor.

Now you can meet the most rigorous standards for precision metrology under

challenging environmental conditions. Our Guardian™ enclosures isolate the

metrology core from the surrounding environment, so you get optimal performance

when and where you need it. Designed and built by ZYGO exclusively for our optical

profilers, Guardian™ enclosures are built to perform and last.

Ergonomic Design

The system is designed to be a self-contained unit, which can be operated from standing

or seated positions. All user interface peripherals can be positioned and adjusted.

A large front-side opening makes the task of loading and unloading test parts and fixtures

simple and efficient. The unit’s interior lighting conveniently illuminates the work area

as well. For serviceability, access panels are also provided around the unit.

Durable, ergonomic and compact, the Guardian™ industrial enclosure for ZYGO 3D Optical

Profilers provides protection from harsh environments, while maintaining performance and

functionality.

ZYGO Guardian™ Key Features

Key Features:

• Isolated metrology core

• Compact footprint

• Acoustical damping side panels

• Ergonomic controls

• Large access door with cover

• Removable access panels for serviceability

• Workspace lighting

• Electronics cooling

• High quality build and finish

• Designed and built specifically for ZYGO optical profilers

ZYGO Nexview™ 650 Maximize ROI

Maximize ROI

The Nexview™ 650 has been designed and built to ensure that the system

provides value for years to come.  With a metrology area that accommodates

lateral dimensions up to 650 x 650 mm and sample load of > 100 kg,

a vertical range of 150 mm, and options for a fully enclosed, or partially

enclosed system, the Nexview™ 650 provides maximum flexibility for large

samples that require precision 3D optical profiling.

For example. The system accommodates:

Any of today’s standard PCB substrate panel sizes

Custom defined sample holders for flexible sheets, etc. which can be deployed

with little concern for their mass on the high load Y stage Large, high mass

injection molding plates that benefit from precise non-contact inspection to

minimize potential precision surface damage Customized chucks and sample

holders can be designed or customer supplied to adapt the system for smaller

panels or even singulated substrates to maximize application flexibility.

And the system’s integrated recipe-driven automation software enables

hands-free metrology of multiple features on each panel, all in a single

workstation, reducing production time and increasing process knowledge.

ZYGO Nexview™ 650: Large Format Inspection & Metrology

The Nexview™ 650 metrology system is an inspection tool for automated

measurement of injection molding tooling, PCBs, glass panels and other

samples requiring an extended work volume up to 650 x 650 mm.

It provides 2D & 3D measurements of a variety of surface features with

sub-nanometer vertical precision and sub-micron lateral precision.

Powerful Performance

Coherence Scanning Interferometry (CSI) is the measurement technology

at the core of the Nexview™ 650 system.

This non-contact technique provides high-precision, and high-value surface

metrology benefits including:

• Measures virtually all types of surfaces, from rough to super smooth,

including thin films, steep slopes, and large steps.

• Sub-nanometer measurement precision is independent of field magnification

• Gage capable performance – exceptional precision and repeatability for the

most demanding production applications.

• SureScan™ vibration tolerance technology – robust operation in virtually any

environment.

• Mx™ software enables seamless data exchange with other ZYGO Profilers

including ZeGage™ Pro, NewView™ 9000. and Nexview™ NX2.

ZYGO NewView™ 9000 Performance, Value, and Versatility

Performance, Value, and Versatility

Flexibility is the hallmark of ZYGO’s NewView products. The NewView 9000 profiler offers

exceptional value with applications as varied as flatness, roughness and waviness, thin films,

step heights and more.

All NewView 9000 profilers are equipped with a triple-zoom turret which can be populated

with discrete zoom optics tailor made for the system. Sample staging configurations range

from completely manual to fully automated with encoded travel.

Regardless of your configuration, all NewView 9000 systems offer high-accuracy measurements,

ease of use, and fast measurements, all at an attractive price point that make it the ideal choice

for versatility and value in 3D optical profilers.

Some of the differentiated features targeted at making users’ metrology better, faster, and more reliable:

• Large-area 1.9 MP sensor with high sensitivity lets you see more in a single measurement

• High-speed measurements take only seconds for improved productivity and process control

• Automated part focus and setup minimizes operator variability and training while reducing the

time to data

• Gage-capable performance through exceptional precision and repeatability for the most demanding

production applications.

• Vibration robust metrology with SureScan technology and available built-in isolation enables high

quality metrology even in vibration-prone environments

• SmartPSI™ technology for ultra-fast profiling of ultra-smooth surfaces

• 2D and 3D correlation provides confidence in your measurements with results that comply to ISO

25178 and ISO 4287 standards.

• Mx™ software for instrument control, analysis, and measurement automation

ZYGO NewView™ 9000 with Coherence Scanning Interferometry Technology

The NewView™ 9000 3D optical surface profiler provides powerful versatility in non-contact

optical surface profiling. With the system, it is easy and fast to measure a wide range of 

surface types, including smooth, rough, flat, sloped, and stepped. All measurements are

nondestructive, fast, and require no sample preparation.

At the core of the system is ZYGO’s Coherence Scanning Interferometry (CSI) technology

which delivers sub-nanometer precision at all magnifications, and measures a wider range

of surfaces faster and more precisely than other commercially-available technologies,

thus optimizing your return on investment.

Flexible Configurations

NewView 9000 Stage & Work AreaThe NewView 9000 profiler features an open work area, with

clear lines of sight, to help make measurement setups and changeovers simple and quick.

Systems can be equipped with a variety of sample staging that range from fully manual X/Y and

tilt stages, to fully automated stages with 150 mm of travel and 4 degrees of tilt. With the integrated

isolation system and compact size, it is well suited for benchtop installations; using the optional stand

and workstation make an ideal production-style system.

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