IZMX trip unit, settings, tripping curves Ralf Nikolic/ PM ACB (air circuit breaker) December, 15th 2011

1. Overview around trip units

Trip unit Common trip units for IZMX16 and IZMX40

Trip units – basic offer A-Type 520 LI V-Type 520 LSI(G) U-Type 520M LSI(G) P-Type 1150 LSI(G/A) Sample: IZMX40H3-A32W Professional protection Basic functions and optional functions Universal protection Selective protection Distribution protection

Catalog - overview Page 6

Catalog - overview Page 7

Catalog - excerp: Further trip unit options Page 39

Digitrip - trip units Pictures of variants Digitrip 520 - Typ A / V Digitrip 520M - Typ U Digitrip 1150i - Typ P

Pictures: IZMX..A, V (Digitrip 520) Variants with options V V with Earthfault protection G A

Pictures: IZMX..U (Digitrip 520M) Variants with options

Pictures: IZMX.. U with ARMS (Digitrip 520M) Variants with options V with ARMS V with ARMS and Earthfault protection G V with ARMS and Earthfault alarm G

IZMX16 and IZMX40 circuit breaker Digitrip trip units 2. Overview trip units top -> down

IZMX16 and IZMX40 circuit breaker Digitrip trip units For all trip units same function: Sealable transparent frontcover: Standard NEW Sealing the mounting screw prevent removing the transparent front cover. => settings can not be changed

IZMX16 and IZMX40 circuit breaker Digitrip trip units For all trip units same function: Reset-Button: • indicates that the trip unit switched OFF (triped) the breaker • Safety: Must be reset before the breaker can be switched ON after a fault. • Optional: - Automatic RESET - Remote RESET (magn. Coil with different voltages) NEU

IZMX16 and IZMX40 circuit breaker Digitrip trip units For all trip units same function: Test socket: connecting test devices: IZM-TEST-KIT or IZM-SIM-KIT Test devices for series IZMX and IZM26 aplicable.

All adjustments are based on the rated current In! IZMX16 and IZMX40 circuit breaker Digitrip trip units For all trip units same function: Rating Plug • independent from internal current transformer exchangeable / easy plug in and safe by screw • Responsible for rated current of the IZM • Currents for In: 200A-4000A For all trip units as: A - Distribution protection V – Selective protection - U - Universal protection - P – Professional protection NEU In cases of field installation: The rated current of the rating plug has to be lower (or same) than the rated current of the breaker. (Safety: Coding of the white screw protect against wrong combinations) Take into account: All adjustments are based on the rated current In!

IZMX16 and IZMX40 circuit breaker Digitrip trip units For all trip units same function: Differentiated trip indication Indication of the trip cause with LED. Indication: - Overload - Short circuit (delayed) - Short circuit (un-delayed) - Earthfault With pushing of „Reste“ Button the LED-indication will be cleared.

IZMX16 and IZMX40 circuit breaker Digitrip trip units NEW For all trip units A, V, U same function: STATUS LED Off - no power to the trip unit On Green – no aux power and not at power up level Flashing Green – Good, microprocessor is running Red then Orange flashing – Trip actuator is not plugged in, ROM or RAM error, calibration error, Making Current Release switch not indicating state correctly. INST LED Flashing Red - Instantaneous fault trip, Making Current Release trip, Maintenance mode trip Flashing Orange – Rating plug bad or missing LONG LED Flashing Red - Long Time trip Flashing Orange – Over temperature trip SHORT LED Flashing Red – Short Time trip Flashing Orange – Improper Breaker Position indication GROUND LED Flashing Red – Ground fault trip GROUND ALARM LED Flashing Red – Ground fault pickup level exceeded HIGH LOAD ALARM LED Flashing Red – Phase Current at 85% of Long Time Pick up or or

IZMX16 and IZMX40 circuit breaker Digitrip trip units For all trip units same function: Battery = Powered the LED for the trip cause request LED for the Battery Test Battery Test or Reset of the trip cause LED

3. Setting of the protection parameters IZMX16 and IZMX40 circuit breaker Digitrip trip units For all trip units A,V, U same function 3. Setting of the protection parameters

Digitrip trip units „overview“ – setting of the protection parameters Short circuit protection delayed (S) all current settings Short circuit protection un-delayed (I) all time settings Overload protection (L) LED‘s for tripping cause For all trip units A,V, U same function

Digitrip trip units „overview“ – setting of the protection parameters time (t) L Ir=0,5-1 xIn In=4000A 2-24s 2-10 xIn S 100-500ms 2-12 xIn und OFF I Example,Ir=0,5: 1xIr (=2000A) (=12000A) 6xIr current (I)

Time Current Curves – Long and Short Ir = LD x In = 1.0 x 1000A = 1000A Ir = Max Continuous Current Rating In = rated current 20 10 LD = 1.0x LDT = 4 s SD = 4x SD = Flat SDT = 0.3s INST = Off 4 TIME IN SECONDS 3 2 1 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 1 4 6 10 Current in multiples of Ir

Time Current Curves – Long and Short Ir = 0.5 x 1000A = 500A Ir = 1.0 x 1000A = 1000A Ir = 0.9 x 1000A = 900A 20 10 LD = 1.0 LDT = 4 s SD = 4 SD = Flat SDT = 0.3s INST = Off LD = 0.5 LDT = 4 s SD = 4 SD = Flat SDT = 0.3s INST = Off LD = 0.9 LDT = 4 s SD = 4 SD = Flat SDT = 0.3s INST = Off 4 TIME IN SECONDS 3 2 1 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 1 4 6 10 Current in multiples of Ir

Time Current Curves – Long and Short Ir = 1.0 x 1000A = 1000A Ir = 1.0 x 1600A = 1600A 20 10 1600A LD = 1.0x LDT = 4 s SD = 4x SD = Flat SDT = 0.3s INST = Off LD = 1.0x LDT = 10 s SD = 4x SD = Flat SDT = 0.3s INST = Off 4 TIME IN SECONDS 3 2 1 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 1 4 6 10 Current in multiples of Ir

Time Current Curves – Long and Short Ir = 1.0 x 1000A = 1000A 20 10 LD = 1.0x LDT = 4 s SD = 10x SD = Flat SDT = 0.3s INST = Off LD = 1.0x LDT = 4 s SD = 4x SD = Flat SDT = 0.3s INST = Off 4 TIME IN SECONDS 3 2 1 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 1 4 6 10 Current in multiples of Ir

Time Current Curves – Long and Short Ir = 1.0 x 1000A = 1000A 20 10 LD = 1.0x LDT = 4 s SD = 4x SD = Flat SDT = 0.5s INST = Off LD = 1.0x LDT = 4 s SD = 4x SD = Flat SDT = 0.3s INST = Off 4 TIME IN SECONDS 3 2 1 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 1 4 6 10 Current in multiples of Ir

Time Current Curves – Long and Short Ir = 1.0 x 1000A = 1000A 20 10 LD = 1.0x LDT = 4 s SD = 4x SD = I2t SDT = 0.3s INST = Off LD = 1.0x LDT = 4 s SD = 4x SD = Flat SDT = 0.3s INST = Off 4 TIME IN SECONDS 3 2 1 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 1 4 6 10 Current in multiples of Ir

Time Current Curves – Instantaneous Ir = 1.0 x 1000A = 1000A Can not show this on this curve! Long/Short curve is in multiples of Ir Instantaneous is in multiples of In 20 10 LD = 1.0x LDT = 4 s SD = 4x SD = Flat SDT = 0.5s INST = Off LD = 1.0x LDT = 4 s SD = 4x SD = Flat SDT = 0.3s INST = Off LD = 1.0x LDT = 4 s SD = 4x SD = Flat SDT = 0.5s INST = 10x 4 TIME IN SECONDS 3 2 1 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 1 4 6 10 Current in multiples of Ir

Time Current Curves – Instantaneous 2.0 1.0 LD = 1.0x LDT = 4 s SD = 4x SD = Flat SDT = 0.5s INST = 10x 0.5 0.4 TIME IN SECONDS 0.3 0.2 0.1 0.09 0.08 0.07 0.06 0.05 0.04 0.03 0.02 0.01 1 4 6 10 Current in multiples of In

Catalog Main optional trip unit functions 4. Catalog Options (G) Earth fault protection (A) Earth fault alarm (M) ARMS (Z) ZSI (Zone selective interlocking)

Catalog (G) Earth fault protection Power System Grounding

Ground Current Protection 1. Source ground: Earth fault metering at the earthed Starpoint 2. TU adds the vectors (lengths and direction) of all currents. Load 3 Phasen + Neutral Grit 4. Accidental ground 3. Zero Sequence metering

Type 2. (3pole breaker) External current transformer for the N-conductor Required: External Transformer – wired on auxiliary terminals no. 15 and 16 External currrent transformer for IZMX40 (Article: IZMX-CT40-N) CT with copper termination External currrent transformer for IZMX16 (Article: IZMX-CT16-N)

Type 1. Source ground or Type 3. Zero Sequence metering Type 1. Source ground: Earth fault metering at the earthed Starpoint or 3. Zero Sequence metering 1. For IZMX16 and IZMX40 Article: IZMX-EFS 3. For IZMX16 only Required: External current transformer – to be wired on the auxiliary terminals 17 and 18. and a jumper on Terminal 19 and 20.

Catalog (A) Earthfault - Alarm An auxiliary contact close when an earth fault occur. Comparable to earth fault protection – but without tripping.

Katalog (M) ARMS ARMS = Arc Reduction Maintenance System Patent of EATON

IZMX16 and IZMX40 circuit breaker Digitrip trip units without ARMS with ARMS Additional protection in cases of maintanance ARMS In cases of an arc fault the tripping of the trip unit speeds up. The released energies are reduced as: Radiation, Temperature, Pressure, Forces of magnetic fields.

ARMS Arc Reduction Maintenance System ARMS can be enabled manually at the trip unit or automatically / remotely by a contact before maintenance in the field begins Remote: External contact on 33, 34 An LED die displays ARMS active or an external signal lamp on terminal 11, 12. ARMS is faster than the un-delayed short circuit protection. A control voltage of 24 VDC (+, -10%) at the terminals 21, 22 is required. IZMX16 / IZMX40

Catalog (Z) ZSI = Zone Selectiv Interlocking ZSI is described in the Technical Report IEC/TR 61912-2 Low voltage switchgear and controlgear – Overcurrent protective devices – Part 2: Selectivity under overcurrent conditions. The term zone selective interlocking is used to describe a method of controlling circuit breakers to provide selectivity with very short interruption times for the breaker closest to the fault.

Zone Selective Interlocking There are different levels (zones) of protection that isolate the fault in the distribution system. ZSI may be applied for faults between phases or earth-faults or both. ZSI is applied to the short time faults where time selectivity can be achieved with the breakers between the zones. Each breaker should have a ZSI unit for selectivity. See next picture ->

Zone Selective Interlocking Example CB1 tsd = 300ms ZSI Zone 1 1 CB2 tsd =200ms CB3 tsd = 200ms ZSI ZSI 2 Zone 2 M CB4 tsd = 100ms CB5 tsd =100ms ZSI ZSI Zone 3 3

IZMX16 and IZMX40 circuit breaker Digitrip trip units 5. Further information

Thermal Memory Thermal Memory electronically simulates the thermal condition of the electrical load to prevent overheating caused by repeated overload conditions. Thermal Memory function will cause faster trip times in sequential testing of breaker poles! The electronic trip unit Thermal Memory function replicates the bi-metal function of a mechanical trip unit.

Thermal Memory Thermal Memory Jumper on Digitrip 520 / 520M Program setting on Digitrip 1150

Thermal Memory For all trip units same function: A, V, U- trip unit Thermal Memory is active when the jumper is removed P- trip unit Program setting

Upgrade (exchange) of trip units in the field The trip units are now easier and saver exchangeable. Re-wiring of the important current transformers are no more risk. Sockel The socket contains the „acknowledge“ of the breaker IZMX16 and IZMX40: Breakig capacity Icu / Ics Rated short circuit withstand Icw, max. rated current, Max. making current …and belongs / remains in the breaker. The socket informs the exchangeable trip unit about this breaker data Unmistakeable exchange of trip unit and via coding even for the rating plug Toolless exchange (plug and work) Socket contains the Battery, (storage of tripping causes) Battery Test- and Reset-Button. -> The Intensity of the Battery-LED informs about the Battery condition. Longer actuation resets the tripping cause information.

Rogowski-sensor The advantage of the Rogowski-sensors are the ferritless core. This results in no saturation an the CT can be uses in a wider range of current under linear and precise measuring. The CT has an additional coil to provide the power supply for the trip unit. IZMX40 Sensor 4000A IZMX16 Sensor 1600A

– IZMX.. U with Display (Digitrip 520M) PH1, 2, 3 = current (A) of phases L1, 2, 3 PH4 = N – neutral-current H5 = G – earthfault-current HI = highest phase-current OL = Current that let to the overload trip (first in first out) Scroll Button to display memory HL = Phase-currrent at 85% of overload setting (Ir). HELP = trip unit not calibrated. 9999 = highest value to display = 4 digits.

P-trip unit (Digitrip1150) NEW 6. The new high end trip unit P (Professional) „All known functions available and easy setting“ „easy adjustment for the needs and application at the trip unit…. or with the communication bus function remotely“

P-trip unit (Digitrip1150) With high definition , modular… ..color grafic display

P-trip unit (Digitrip 1150i) further technical information New Hardware Platform — Digital Signal Processor – 120MHz (today 4MHz) A minimum of 64 samples per line for each line cycle on each phase for current and voltage New analog sensing circuit focused on higher accuracy (testing in the laboratory so far is yielding < 2% on pick-up and trip times.) Metering accuracy will be 1% of READING Color Graphic Display Voltage, line to neutral readings. Flexible communication design

Value of Improved Metering Capability Example: 1% of full load (rated current) = +/- 40A 1% of READING = +/- 1A 4000A Breaker Input of 100A Market Standard for Breakers 60A 140A Meter Special Bus Bar CT’s IZMX with P trip unit 99A 101A Extra Wiring Revenue Grade Metering (PMX) Improved metering can reduce the use of using additional metering equipment and can reduce panel assembly time 99.9A 100.1A

P-trip unit (Digitrip 1150i) Setting at front face 1. 2. „All known functions available and easy setting“ 1. 2.

P-trip unit (Digitrip 1150i) Setting at front face „easy adjustment for the needs and application at the trip unit…. or with the communication bus function remotely“

External power supply for P-trip unit IZMX16 (NF) One PT module supplies 16 breaker Rate to 690Vac, One PT Module for 16 breaker Switches integrated, Compact housing, DIN rail mounting on back

Protective Relay Features To be highlighted: Relay Protection package User enable/disable with Time Delay Adjustable under/over voltage release (trip or alarm) Adjustable under/over frequency release (trip or alarm) Voltage unbalance (trip or alarm) Reverse power (trip) Phase Rotation (alarm) Future functionality of the 1150 will add a relay protection package. This functionality will be available at the end of 1999. This will replace externally mounted relay protective devices, this improves the reliability of the protection scheme because it reduces the discrete wiring of these devices.

Digitrip 1150 Slope Selection

Digitrip 1150 Slope Selection IEC A (Normal Inverse) IEC B (Very Inverse) IEC C (Extremely Inverse)

Communication „Interfaces“ IZM PROFIBUS-DP V0 Slave ModbusRTU ECAM PCAM MCAM Ethernet ModbusTCP i.V. SMTP Mail http(s) WebServer IZM ICAM IncomBUS (USA) IZMX 16/40

IZMX Communication Modules Flexible Communication Platform — Modbus RTU PROFIBUS DP Ethernet INCOM Module / address stays with cassette Communications “Open” and “Close” via module not through trip unit +24 Volt DC control power Use with U- und P-trip units

Communications Open / Close via bus - Wiring The Communication modul contains change over contacts for ON and OFF coils Spring release SR and Ashunt trip ST in the breaker

IZMX Communication module installation

IZMX16 and IZMX40 Switch disconnector (without trip unit) Switch disconnector INX… Without trip unit without internal current transformer With making current release (MCR)