Category: ABB

Function

STOTZ selective main circuit breakers operate voltage

independent. They do not require auxiliary energy for swit

ching the device on or off or for their protection functions.

A straight forward design ensures the reliable protection

function. The functional elements consist of proven electro

mechanical components specifically designed for these

requirements.

The underlying switching principle enables a special selectivity

behaviour: current-limiting selectivity. When a short circuit

occurs, the S 750 supports the downstream mcb and also

limits the energy that has an impact on the installation and –

subsequently – on the network of the supplier. The selectivity

behaviour of the S 750 offers major advantages compared to

fuse-based technologies.

Special features of the

selective main circuit-breaker S 750

− High breaking capacity 25 kA at 230/400 V~

− High energy limitation

− Suitable to provide selective overcurrent protection

in meter boards and in main distribution frames

− Suitable for isolation of electric circuits

− Current-limiting selectivity

− Voltage independent function

− High isolation ability:

Ui = 690 V,

Uimp = 6 kV with a test voltage of 9.8 kV

Overvoltage category IV,

Pollution degree 3

− Easy assembly with screwless connection to busbars

and cables on the load side

− Input frame terminals for busbar feeding

up to 50 mm2/100 A

− Isolation function according to IEC 60364 and IEC 60664

− Additional contact position indicator

RED = ON / GREEN = OFF

− Lockable and sealable

− Can be operated by ordinary people

STOTZ selective main circuit breakers fully comply with

the requirements of the German utilities directive (Technical

Connection Requirements of Network Operators) concerning

the mandatory pre-meter isolation and protection functions.

For these applications, selective main circuit breakers:

− ensure load current carrying capability over a large

temperature range;

− protect cables in the case of functional overload;

− protect cables in the case of a short circuit;

− clear high short-circuit currents reliable;

− limit the let-through current and let-through energy also

in the case of selective short-circuit disconnection by

downstream mcb

− provide disconnection and re-connection of installation,

also by ordinary people;

− provide selectivity with respect to downstream

circuit-breakers and upstream fuses;

− ensure highest availibility of electrical power supply for the customer.

The short-circuit capacity of the S 750 is 25 kA

(system voltage 230/400 V AC) throughout the entire range

of rated current.

Due to its particular current-limiting selectivity features,

STOTZ selective main circuit breakers support downstream

circuit-breakers in limiting the energy when a short circuit

occurs, thus reducing the load on the back-up fuse and the

entire electrical installation.

STOTZ selective main circuit breakers are suitable to

disconnect and release electric circuits.

STOTZ selective main circuit breakers can be operated

by ordinary people. The contact position is indicated clearly

and unambiguously by (1) the position of the operating lever,

clearly identified by the 0-I positions, and (2) also by a

separate position indicator (RED = on, GREEN = off).

Selective main circuit breakers S 750 operate voltage

independent (VI) according to E DIN VDE 0641-21. i.e. they

do not need a control circuit to make or break a contact.

STOTZ selective main circuit breakers S 750 are available with

tripping characteristic E (E = Exact)

Selective main circuit breakers S 750 series The technology

Brief description

Selective main circuit breakers of the S 750 series fully

comply with E DIN VDE 0641-21. They operate voltage

independent, i.e. their function does not depend on auxilary

source (SHU). They are designed for mounting onto 40 mm

busbar systems (4- or 5-pole, 5/10 mm x 12 mm).

Independant of current rating of S 750. short circuit

discrimination of up to 10.000 A or even higher is available

for the downstream circuit-breakers.

They are particularly suitable for the following applications:

− in the meter-mounting board as the main isolating device

for the customer

− in main distribution frames or switchgear as selective

group or back-up breaker, especially where a high degree

of continuity of supply is required, e.g. for “installations for

gathering of people”, in “medical locations” and for the

supply of safety equipment.

Standards conformance

The SuperSwitch®GT shall operate in conformance

with the following applicable standards:

• IEEE 1547 – standard for interconnecting

distributed resources with electric power systems)

• ITIC

Order fulfillment

Prior to receipt of the confirmed order, the approval

drawings set will contain the following information

• Physical arrangement and outline dimensions of equipment and equipment base details

• Weight of each shipping section

• Location in plan and elevation of incoming and outgoing terminals

• Space available for entrance of conduits

• Location in plan and elevation of all ground terminals

• Complete list and rating of all equipment devices to be furnished

• Single line diagram

• Complete interconnection diagrams for all internal and field wiring

• Complete details showing locations of all bus with bolting details

• Complete details for enclosures showing bolting details between sections

• Grid tie switch operating system description

• List of recommended spare parts

SuperSwitch®GT can be customized to meet various

application needs. Therefore, we require the

following with a request for quote:

• Basic specifications and one line

• Application and components involved such as wind,solar, DG etc.

• Site specifics

• Any special coordination or testing needs

Analog data provided

• kW

• kVAR

• PF

• RMS phase voltages

• RMS phase currents

• Symmetrical components

Digital data provided

• Switch open

• Switch closed

• Switch bypassed

• Auto mode selected

• Manual mode selected

The SuperSwitch®GT offers the following GUI controls

• Local – will connect and reconnect when conditions are within limits.

• Off – is disconnected and semiconductors are de-energized.

• Remote – accepts “connect” and “disconnect”

commands from an external control system. If the

connect command is given it will connect and

disconnect when conditions are within limits of

the SuperSwitch®GT internal controls.

Technical specifications

General

• 200–1200A

• 480 VAC, 3-phase, 3 or 4-wire (neutral not switched), 60Hz

• Exceeds ITIC requirements by disconnecting

from failing utility in under 20ms

• Load protection with smooth, instantaneous

transfer between micro and utility grid

protection events, IEEE 1547 events, and power quality events.

• Automatic sensing and control automatic

separation of microgrid and utility grid during

system problem and reconnection back to the

utility grid when the utility system is normal

• Offers synchronism check

• Based on silicon controlled rectifier (SCR) technology

• Offers necessary series protection to clear any

internal faults caused by component failures

• Normal rating is 220% of the system rated

voltage per IEEE 1547 Section 4.1.8.3.

• Communications capabilities through relays and modbus RTU (RS485) or modbus TCP/IP

• Easy interface to a SCADA system via modbus RTU (RS485) or modbus TCP/IP

• Optional NEMA 3R enclosure

200–1200A digital disconnect switch Supporting the smart grid installation

SuperSwitch®GT

Cyberex® is proud to introduce the three phase SuperSwitch®GT, for integrating

distributed energy sources with electrical power utility grids. The SuperSwitch®GT

protects critical loads on any micro grid from power quality anomalies on the utility

grid by instantly isolating it to provide reliable power.

Why SuperSwitch®GT

• Protects micro grid from utility outage

• Protects utility from faults on the micro grid

• IEEE1547 protection – under/over voltage, under/

over frequency and unintentional islanding protection

• Provides power quality function that has an

adjustable over and under peak voltage level

with an adjustable response time delay

• Detects instantaneous (fault) current

• Offers the capability to accept external open commands

• Enhanced monitoring of voltage, frequency, and

phase difference at the DG side and utility side

and will connect when conditions are within limits.

• Automatic calculation of the power flow for the

unintentional islanding protection required per IEEE 1547

• Backed by world class service support.

Standard features

–   5-year product warranty

–   Universal main control board operates in any of our DC Charger digital chargers

–   1% digital LED meter for VDC, Adc, timer hours and alarm settings

–   AC on indicating light

–   AC input and DC output circuit breakers

–   Float/equalize selector switch with indicating light

–   Manual equalize timer (0–255 hr.) with indicating light

–   AC line failure automatic equalize timer (0–255 hr.) with indicating light

– Self-diagnostics

–   Local or remote voltage sense with redundancy to protect against remote sense failure

–   High DC voltage shutdown (HVSD)

–   Reverse polarity protection via free wheeling diodes

–   Front panel controls can be disabled for security

–   Input and output MOV surge suppressors

–   CU-AL I/O compression lugs

–   Switchboard wire, UL VW-1

–   Membrane front panel

–   Enclosure pre-treated using a 5-stage iron phosphate process

with baked epoxy powder coating in ANSI 61 gray

–   Alarm assembly with local LEDs and summary relay contact

for AC failure, DC failure, high VDC, low VDC, positive and negative ground fault

–   A redundant analog circuit for LVDC alarm, independent of the microprocessor

–   6 pulse rectification

–   Forced load share during parallel operation

–   Redundant control loops for higher reliability

–   Custom parts data package and production test data reports shipped with each unit

–   User-friendly operating manual with standard drawings

–   Quick setup sheet