12 Oct
2024
12 Oct
'24
5:45 p.m.
The system is based in a minimal configuration of the following racks using a own psu per
unit.
CPU
Interconnect
Memory
IOU
to be extended by a second CPU rack for a dual processor configuration.
If the interconnect rack does have an own psu we don‘t know now, since this unit has to be
picked up next.
Peripheral external device controllers have to be assessed separately. These will be part
of a future pickup.
Even the CC545 Console will be a challenge.
Luckily we saved one before being shipped via the SAP collection to CHM.
The next upcoming tasks will be a detailed inspection of the system as well as to dig into
the documentation.
Luckily some docs are on bitsavers, e.g. the site prep guides and we are awaiting paper
based docs or will have access.
We are able to provide 73KW 3 Phase 50Hz electrical power as of today.
The real power consumption has to be assessed based on the documentation.
To use a modern digital controlled frequency converter will have the advantage to limit
the power surge during startup.
Andreas
Am 12.10.2024 um 18:24 schrieb Jon Elson via cctalk
<cctalk(a)classiccmp.org>rg>:
On 10/12/24 09:47, Chuck Guzis via cctalk wrote:
The IBM 370/145 had a motor/generator set with a 20 Hp 60Hz motor and a 17 KVA
400 Hz 120/208 3-phase alternator. This was massive overkill for the 2.5 KW model 145, so
I assume they used the same MG unit for the 370/158 model.
Good luck finding one of those now!
As for the sensibility of going this way, be sure you have vast amounts of power
available to start such an MG unit. The phase current in that MG was around 60 A no
matter the load (phase angle changes with load), and the starting surge was WAY worse.
Jon
On
10/12/24 04:51, hupfadekroua via cctalk wrote:
Hi all,
after approx 30 years of waiting our time has come to get hands on a Cyber 180/860a.
These systems as other systems before are using 400Hz psus.
ISTR that 400Hz
3-phase is required.