General description
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1 / 6 Control unit ZH 914.pps Schaltbau GmbH · 81677 Munich · Klausenburger Str. 6 · Phone: +49(0)89 930 05-0 · Fax: +49(0)89 930 05-350 © Schaltbau GmbH Return to page 1 General description Railway vehicles often have to cope with different power supply systems ( eg 1 kV AC, 1.5 kV AC, 1.5 kV DC and 3 kV DC ). The monitoring and control unit ZH 914 monitors the power supply system. When there is a change in the voltage the ZH 914 will activate the change-over unit and change the position of the auxiliary switches to ensure the correct operation of train systems and equipment. The microprocessor controlled device monitors power supply systems working with DC voltages up to 5 kV or AC voltages up to 3 kV. The ZH 914 differentiates between two to five different power supply systems and provides five different output signals needed to control the change-over units. Special features and new ones: Special features and new ones: CE certificate, EMC-tested
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1 / 6Control unit ZH 914.pps
Schaltbau GmbH · 81677 Munich · Klausenburger Str. 6 · Phone: +49(0)89 930 05-0 · Fax: +49(0)89 930 05-350
© Schaltbau GmbH
Return to page 1
General descriptionRailway vehicles often have to cope with different power supply systems ( eg 1 kV AC, 1.5 kV AC, 1.5 kV DC and 3 kV DC ). The monitoring and control unit ZH 914 monitors the power supply system. When there is a change in the voltage the ZH 914 will activate the change-over unit and change the position of the auxiliary switches to ensure the correct operation of train systems and equipment. The microprocessor controlled device monitors power supply systems working with DC voltages up to 5 kV or AC voltages up to 3 kV. The ZH 914 differentiates between two to five different power supply systems and provides five different output signals needed to control the change-over units.Special features and new ones:Special features and new ones: CE certificate, EMC-tested microprocessor controlling protection against faulty switching no change-over actions under load possible no change-over actions in 1500 V AC networks when
phase is changed.The parameters of the power supply systems are defined in program tables, easy to change (see Ordering code).
2 / 6Control unit ZH 914.pps
Schaltbau GmbH · 81677 Munich · Klausenburger Str. 6 · Phone: +49(0)89 930 05-0 · Fax: +49(0)89 930 05-350
© Schaltbau GmbH
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Ordering code
ZH 914
Switch-off characteristics:N Normal switch-off characteristics
Maximum switch-off voltage U max-off, according to table 1 or table 2, see selection voltage range
E Extra switch-off characteristicsExtra maximum switch-off point for 3 kV DC range, all other voltage ranges according to table 1 or table 2, see “Selection of voltage range”
Number of control-outputs for voltage ranges:1 4: [1 kV AC], [1.5 kV AC], [1.5 kV DC], [3 kV DC]2 5: [1 kV AC], [1.5 kV AC], [1.5 kV DC], [3 kV DC], [3 kV AC]3 3: [1 kV AC], [1.5 kV AC & 1.5 kV DC], [3 kV DC]4 3: [1 kV AC], [1.5 kV AC & 1.5 kV DC], [3 kV DC & 3 kV AC]
Control voltage of the device:24 V DC according to UIC
120 16.8V … 158V
Special features for 1 kV AC range:N 16 2/3 Hz and 50 Hz allowedI 16 2/3 Hz only
Number of selected voltage ranges:4 4: 1 kV AC, 1.5 kV AC, 1.5 kV DC, 3 kV DC5 5: 1 kV AC, 1.5 kV AC, 1.5 kV DC, 3 kV DC, 3 kV AC
Selection of voltage range:1 Table 1, safety check at the main heater with 500…1440 V
2 Table 2, safety check at the main heater with 500…1440 V
3 Table 1, safety check at the main heater with 0…1440 V
5 Table 1, safety check at the main heater with 500…1440 V, new features
6 Table 2, safety check at the main heater with 500…1440 V, new features
3 / 6Control unit ZH 914.pps
Schaltbau GmbH · 81677 Munich · Klausenburger Str. 6 · Phone: +49(0)89 930 05-0 · Fax: +49(0)89 930 05-350
© Schaltbau GmbH
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Table 1: Definition of power supply systems of European coaches according to UIC550
Available program tables defining power supply systems
Name ofpowersupplysystem
Switch-on voltageU min-on
Minimum voltageswitch-off point
U min-off =U min-on -X
Maximum voltageswitch-off point
U max-off
Re-entry voltage( switch-on point )
U max-on =U max-off + Y
Extra maximumswitch-off point
1 kV AC 750V +/- 50V 50 - 80 V 1250 +/- 50V 50 - 80 V ---1.5 kV DC 950V +/- 50V 50 - 80 V 1975 +/-75V 80 - 125 V ---1.5 kV AC 1100V +/- 50V 50 - 80 V 1860 +/- 75V 80 - 125 V ---3 kV DC 1900V +/- 75V 50 - 125 V 4050 +/- 100V 150 - 250 V 4150V3 kV AC 1900V +/- 75V 50 - 125 V 4050 +/- 100V 150 - 250 V ---
Table 2: Definition of very special power supply systems of European coaches
Name ofpowersupplysystem
Switch-on voltageU min-on
Minimum voltageswitch-off point
U min-off =U min-on -X
Maximum voltageswitch-off point
U max-off
Re-entry voltage( switch-on point )
U max-on =U max-off + Y
Extra maximumswitch-off point
1 kV AC 700V +/- 50V 50 - 80 V 1250 +/- 50V 50 - 80 V ---1.5 kV DC 900V +/- 50V 50 - 80 V 2050 +/-75V 80 - 125 V ---1.5 kV AC 1050V +/- 50V 50 - 80 V 1860 +/- 75V 80 - 125 V ---3 kV DC 1800V +/- 75V 80 - 125 V 4050 +/- 100V 150 - 250 V 4300V3 kV AC 1825V +/- 75V 50 - 125 V 4050 +/- 100V 150 - 250 V ---
4 / 6Control unit ZH 914.pps
Schaltbau GmbH · 81677 Munich · Klausenburger Str. 6 · Phone: +49(0)89 930 05-0 · Fax: +49(0)89 930 05-350
© Schaltbau GmbH
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208 8 23
6
250
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160
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Monitoring and control unit ZH 914Dimension Diagram
5 / 6Control unit ZH 914.pps
Schaltbau GmbH · 81677 Munich · Klausenburger Str. 6 · Phone: +49(0)89 930 05-0 · Fax: +49(0)89 930 05-350
© Schaltbau GmbH
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Note for replacing a ZH 714 type by a ZH 914 type:
After each operation of the change-over unit all control units will test the correct position of the switches by switching on one part of the electrical heater. If there are 0V ... 1440 V the old ZH 814 type detects correct operation. The new ZH 914.1xx and ZH 914.2xx types, however, detect correct operation only if there are 500V...1440 V.This means that whenever the ZH 914 will be tested there has to be at least a minimum of 500 V at the test point.
Type Ordering code Replaced by ZH 914 type: Used in:
ZH 714 AA 1-1353-571024 ZH 914 .11 N 4 N 120Germany
ZH 714 A2 1-1353-558690 ZH 914. 11 N 4 N Germany
ZH 714 B 1-1353-182362 ZH 914. 14 N 5 N Hungary
ZH 714 C 1-1353-106711 ZH 914. 11 N 4 N Hungary
ZH 714 E 1-1353-341425 ZH 914. 11 N 4 N Switzerland
ZH 714 EA 1-1353-116592 ZH 914 . 11 N 4 N 120 Switzerland
ZH 714 D 1-1353-591211 ZH 914. 11 N 4 N Belgium
ZH 714 F 1-1353-211222 ZH 914.11 E 4 NGermany
ZH 714 F 1-1353-211222 ZH 914.31 E 4 NGermany,
Wrmz 137.1
Replacing ZH 714 types
6 / 6Control unit ZH 914.pps
Schaltbau GmbH · 81677 Munich · Klausenburger Str. 6 · Phone: +49(0)89 930 05-0 · Fax: +49(0)89 930 05-350
© Schaltbau GmbH
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Replacing ZH 814 types
Type Ordering code Replaced by ZH 914 type: Used in:
ZH 814 A 1-1352-570816 ZH 914.13 N 4 NWith additional connector cable: ZH 618 S Germany
ZH 814 B 1-1352-748564 ZH 914.13 N 4 NWith additional connector cable: ZH 618 S Belgium
ZH 814 C 1-1352-589025 ZH 914.14 N 5 NWith additional connector cable: ZH 618 S Hungary
ZH 814 G 1-1352-582411ZH 914.14 N 5 N
With additional connector cable: ZH 618 S Yugoslavia
Note for replacing a ZH 814 type by a ZH 914 type:
1. After each operation of the change-over unit all control units will test the correct position of the switches by switching on one part of the electrical heater. If there are 0V ... 1440 V the old ZH 814 type detects correct operation. The new ZH 914.1xx and ZH 914.2xx types, however, detect correct operation only if there 500V...1440 V.This means that whenever the ZH 914 will be tested there has to be at least a minimum of 500 V at the test point.
2. The ZH 814 has a 8-pin connector, the ZH 914 has a 10-pin connector. So replacing a ZH 814 by a ZH 914 you always have to change the cable, too ( see table )!
