Notes On Materials; Cabinet Design An Connection System - Siemens simovert masterdrives Betriebsanleitung

08.2008
11.1.5

Notes on materials

NOTICE
11.1.6

Cabinet design an connection system

Siemens AG 6SE7087-6JK50
SIMOVERT MASTERDRIVES
Cooling water installations with copper pipes and/or copper joints are to
be avoided and are possible only if special measures are taken, e.g.
closed cooling circuit, full filtering (i.e. copper ions are filtered out),
water additives (such as the products of Nalco Deutschland GmbH;
www.nalco.com; D-60486 Frankfurt, Tel. +49-697934-410).
The hose connection nozzles on the heat sink side must be of stainless
steel or heavy gauge aluminium. Under no circumstances may the
connection nozzles be of brass or copper.
PVC hoses are not suitable for use with antifreeze!
Hard PVC pipes are suitable for use with the antifreeze agents listed in
Section "Antifreeze additive".
The water cooling system must not contain any zinc at all.
Where antifreeze is used, please note:
zinc reacts with all glycol-based inhibitors.
Never use galvanized pipes for this reason!
If the plant incorporates normal iron pipes or cast iron
accessories (e.g. motor housings), a separate cooling system with
water/water heat exchangers is to be installed for the converters.
If a heat exchanger made of CuNi 90/10 is used, be sure to pay
attention to the water conductivity (hose) (see Section "Note regarding
installation and components").
♦ Components not mounted on the heat sink, e.g. the electronic
devices and the DC link capacitors, are cooled by the heat
exchangers at the heat sink fins.
When a chassis unit is installed in a cubicle, make sure that the air
discharged by the fan can enter the inside of the chassis. For this
reason, there must be a clearance of at least 130 mm between top
of chassis and cubicle roof (or existing cover) for applications with
degrees of protection > IP42.
The compartmentalizations to be fitted to units with air-cooling are
counterproductive here! They must not be fitted.
♦ The units require no external cooling air.
It must nevertheless be kept in mind that additional heat losses of
other components in the cubicle, such as reactors, cannot be
extracted!
♦ The temperature of the cooling air circulating inside the chassis is
monitored with a sensor.
Operating Instructions
Technical Data
11-19