S748-772 Instructions Manual | 7 Technical description
7.2.5 Fusing
Internal fusing, wire fuse or electronic
Circuit S748 / S772
24V Electronics 4 A
24V Motor brake 4 A
Brake resistor electronic
External fusing
Fusible cutouts or similar S748 S772
AC supply F
N1/2/3
60 A* 80 A*
24V Electronics F
H1/2
8 A** 8 A**
24V Brake F
H3/4
8 A** 8 A**
Brake resistor F
B1/2
100 A*** 100 A***
* EU fuses: types gRL or gL, 400V/500V
US fuses: class RK5 or CC or J or T, 600VAC 200kA, time-delay
** e.g. wire fuses or micro fuse or Automatic Circuit Brakers
*** EU fuses: Bussmann HLS, 690V/100A
US fuses: Bussmann FWP-xxA22F, Size 22x58mm, UL approved for 500Vdc
Tips and detailed information can be found in the "KDN".
7.2.6 Ambient Conditions, Ventilation, and Mounting Position
Storage, hints (➜ # 18)
Transport, hints (➜ # 18)
Surrounding air tem-
perature in operation
0 to +40°C (32 to 104°F) at rated data
+40 to +55°C (113 to 131°F) with power derating 2.5% / K
Humidity in operation rel. humidity 85%, no condensation, class 3K3
Site altitude up to 1000m a.m.s.l. without restriction
1000 — 2500m a.m.s.l. with power derating 1.5%/100m
Pollution level Pollution level 2 to EN 60664-1
Vibrations Class 3M1 according to IEC 60721-3-3
Enclosure protection IP 20 according to EN60529
Mounting position generally vertical (➜ # 56)
Ventilation built-on/built-in fan (optionally controlled, option F2)
The servo amplifier shuts down (F01 and F13 (➜ # 123),
motor has no torque) in case of excessively high tem-
perature in the control cabinet.
Make sure that there is sufficient forced ventilation within
the switchgear cabinet.
Kollmorgen requirements for servo amplifiers with Coldplate:
Flatness of the mounting (cooling) plate: ≤ 25 μm / 100 mm
Mains voltage Max. thermal
resistance
Max. allowed temperature
at center of coldplate
230 V 0.063 K/W 75 °C
400 V 0.055 K/W 75 °C
480 V 0.051 K/W 75 °C
The cooling plate temperature must not be more than 10 K below the environment tem-
perature. With a difference of more than 10 K there is a risk of condensation. Condensation
may destroy the electronics of the servo amplifier.
32 Kollmorgen | kdn.kollmorgen.com | July 2019
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