Elproma NTS-3000 User manual

NTS-protect
Description of GPS antenna and NTS time server connection via
system lightning protector system
/NTS-3000, NTS-4000, NTS- 000/
SAFETY INSTRUCTIONS !
This are the important Safety Instructions that should be followed during installation and
maintenance of the ELPROMA TS-protect overvoltage system.
IMPRTANT NOTE !
This equipment contains hazardous voltages. Do not handle any metallic part until the
power has been disconnected. Do not assemble, disassemble set when the power is ON.
Making wiring and touching cables is strongly prohibited when power is ON. Please refer
your RACK’19 safety instruction to learn more on connecting power of equipment. The
NTS-protect system requires PE line to be connected into RACK’19 din rails.
Electrical Safety:
1. Do not work alone under hazardous conditions.
2. High short circuit current trough conductive materials could cause severe burns.
. Check that the power cord(s), plug(s), and sockets are in good conditions.
4. Use qualified service personnel to install permanently wired equipment.
5. Do not handle any metallic part before the power has been disconnected.
© 2008 ELPROMA Electronics

Introduction
The GPS (DCF77) antenna located on the building roof is connected to a GPS/DCF77
module situated nearby. This module is connected to a remote TS (models: TS-3000,
TS-4000, or TS-5000) server via lightning protector system ( TS-protect unit). This
system is a unit of overvoltage and lightning protection preventing the TS server from direct
and indirect effects of atmospheric discharges. The TS-protect system has been designed to
secure against switching overvoltage and lightning surge, and that voltage limiters shall apply
thereto. The construction of the unit is based upon the rule of voltage compensation in
accordance with P – IEC 61024-1 standard. It stipulates upholding safe levels of
overvoltage that will not damage the insulation in all protected electrical circuits of the TS
server.
Overvoltage protection has been applied to the following input and output lines of the TS:
1. Antenna GPS/DCF77 input (8 lines: 6 signal lines 12V DC + 2 power lines 24V DC)
2. LA Ethernet Cat 5 input (2 network lines)
3. 230V AC 50Hz power supply system (2 lines: L, /T -C std.)
in compliance with the scheme below:
LA /servers, routers, switches, workstations/
GPS/DCF77 antenna RACK’19 Main power
I/O for antenna Ethernet Cat. 5 układ zasilania
TS-3000, TS-4000, TS-5000
General operational description:
GPS 24V
DCF77 2xLA 230VAC

All in/out lines of the TS server have been conducted through overvoltage limiters
mounted altogether on the steel-made DI 35/7,5mm bus, a standard solution applied to
industrial automatics for rack’19 switchboxes. The height of the solution is 2U and it is
mounted inside the rack’19 switchbox, e.g. on the back of the TS server.
Overvoltage limiters are arranged as parallel systems including non-linear components
such as gas spark gaps, semiconductor diodes and voltage-dependent resistors. They provide
a quick change of resistance leading the current of overvoltage origin down into the protection
circuit (yellow/green wire) of the rack’19 switchbox. All electrical leads of limiters are in the
form of screw terminals.
Limiter type: Signal description: Cable type
- PT 5-HF (GPS/DCF77 signals) Cat 5 outdoor 4 twisted pair cable
- PT 2-PE/S (Antenna power 24V) Cat 5 outdoor 4 twisted pair cable
- D-LA -CAT.5E-U (2x LA - Ethernet) Cat. 5 Ethernet cable
- VAL-MS (230V AC power) Std. 230V AC Power (PC)
NTS-protect general iew
230 AC 24 AC/DC 12V DC Ethernet
Main power Antenna power Antenna signals LA 1 LA 2
NTS-protect (2U – RACK’19) back panel view
PE
DI 35/7,5mm (Rack’19) rails
Important Note ! The NTS-protect system requires PE line to be connected into RACK’19
din rails.
Description of antenna track protection (signals: GPS/DCF77 and DC power line)
VAL
MS
230
ST
VAL
MS
230
ST
PT2
PE/S
24V
PT5
HF
12V
PT5
HF
12V
D
LA
CAT5
D
LA
CAT5

The TS server communicates with the GPS/DCF antenna module via low-signal
circuits of the voltage levels not exceeding 12V. The transmission is carried out through a
standard Cat5 ethernet twisted pair cable, cramped into RJ-45 connectors in TIA-568B
scheme. The cable has two lines (brown, white-brown wires) providing power supply to the
antenna module. The aforesaid lines are protected with two-component limiter (3 pcs.)
mounted onto a DI 35/7,5mm bus with a downlead into the protection circuit. Cramps
holding odd numbers are equipped with a cable leading into the GPS/DCF antenna module
(roof direction) whilst cramps holding even numbers go with the TS server. The cable wires
are colored on same way as std. 5 Cat. Ethernet cable (TIA-568B). The power lines are
indicated by brown and white-brown color.

Description of Ethernet link protection (2 x LAN Cat. 5).
NTS ser er
LAN1 LAN2
PE PE
PE wire PE wire
LAN1 LAN2
Ser ers, Routers, Switches, Workstations
Protection of the Ethernet line is provided due to additional reduction of the risk
resulting from damages that may occur via LA /WA network. The solution has been
designed in compliance with IEC 61643-21 standard. The system holds D-class certificate in
accordance with DI E 50173-1:2002 standard for LA network solutions. The limiter is
connected to the TS-3000 server and LA /WA network with standard Cat. 5 wires. The
length of wires along the “ TS-3000 server – lightning protector” track should be of the least
possible value. The lightning protector is mounted onto a DI 35/7,5mm bus whilst its
protection wire is linked to the protection circuit (yellow and green wire) through a special
cramp on the rack.
I
D-LA
CAT5.E
Ethernet
OUT
I
D-LA
CAT5.E
Ethernet
OUT

Description of power supply system protection 230V AC (VAL-MS 230ST limiters)
Rack’19 NTS-protect NTS ser er
L L
N N
top
PE
DI 35/7,5mm (Rack’19 rails)
bottom
PE PE
Due to wide scope of applications and high efficiency as well, the system has been
assumed to be provided with the protection made for the entire rack’19 switchbox. Then the
issue to discuss is barely the way the power is distributed inside the rack’19 switchbox (it
refers to the number of internal outlets mounted onto the bus) and not the way of supplying
the power to the entire rack’19 switchbox along its appropriate grounding system (PE line).
So the protection of the 230V AC power supply system has been handled through C/II-class
limiters in accordance with IEC 61643-1 and E DI VDE 0675 standards. These are limiters
maintaining the protection level parallel to D-class (reaching 1m5kV for 20kA at 8/20uS) and
allowing for the downlead of the current up to 3kA (10/350uS), typical for supplementary
safety measures that include protection of the 230V AC power supply system. Such solutions
are in regular use in the industry, for rack’19 switchboxes with the industrial automatics.
TS-protect solution has 2 limiters of this kind (one in each wire; 1-L; 2- ), working in
parallel in the power supply system. Limiters are installed onto the DI 35/7,5mm bus. It is
recommended to provide the discussed system with supply for devices operating in the same
rack’19 switchbox.
VAL
MS
230
ST
VAL
MS
230
ST

Final information and general supplementary recommendation
1. The DI 35/7,5mm bus must be joined to the protection circuit of the electrical
terminals
2. All wires (including those of other devices) inside the rack’19 switchbox, that may
cause overvoltage should be grouped so that they stay away from each other. Cores of
the wires should go together and keep a relevant distance.
3. All wires connected to the protection systems should be of the least possible length.
NOTE !
Remember that the NTS-3000 unit only minimizes the probability of damages resulting
from overvoltage and arising directly or indirectly as a consequence of atmospheric
discharges, however, it provides no absolute warranty against overvoltage.
© ELPROMA Elektronika

APPE DIX
Technical specification